diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 4f2f8a013e..dd2489910c 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -6789,6 +6789,38 @@
     "messageformat": "9:16",
     "description": "Media editor > image editing controls > crop tool > Crop presets > 9:16 (9 by 16)"
   },
+  "icu:MediaPermissionsModal__title--microphone": {
+    "messageformat": "Allow access to your microphone",
+    "description": "Title of MediaPermissionsModal when notifying user about absent microphone permissions"
+  },
+  "icu:MediaPermissionsModal__title--camera": {
+    "messageformat": "Allow access to your camera",
+    "description": "Title of MediaPermissionsModal when notifying user about absent camera permissions"
+  },
+  "icu:MediaPermissionsModal__subtitle--call": {
+    "messageformat": "To join or start a call:",
+    "description": "Subtitle of MediaPermissionsModal when notifying user about insufficient microphone permissions for starting a call"
+  },
+  "icu:MediaPermissionsModal__subtitle--call--camera": {
+    "messageformat": "To enable your video:",
+    "description": "Subtitle of MediaPermissionsModal when notifying user about insufficient camera permissions for starting a call"
+  },
+  "icu:MediaPermissionsModal__subtitle--voice-note": {
+    "messageformat": "To send voice messages:",
+    "description": "Subtitle of MediaPermissionsModal when notifying user about insufficient media permissions for recording a voice note"
+  },
+  "icu:MediaPermissionsModal__step-1": {
+    "messageformat": "Tap “{buttonName}” below",
+    "description": "Text of the first step of the instructions from MediaPermissionsModal"
+  },
+  "icu:MediaPermissionsModal__step-2": {
+    "messageformat": "Turn on “Signal”",
+    "description": "Text of the second step of the instructions from MediaPermissionsModal"
+  },
+  "icu:MediaPermissionsModal__open": {
+    "messageformat": "Go to settings",
+    "description": "Text of the button opening system media permissions preferences window"
+  },
   "icu:MyStories__title": {
     "messageformat": "My Stories",
     "description": "Title for the my stories list"
diff --git a/app/main.ts b/app/main.ts
index 67f3d42ed2..5c805dd4c0 100644
--- a/app/main.ts
+++ b/app/main.ts
@@ -2988,12 +2988,32 @@ async function ensureFilePermissions(onlyFiles?: Array<string>) {
 ipc.handle('get-media-access-status', async (_event, value) => {
   // This function is not supported on Linux
   if (!systemPreferences.getMediaAccessStatus) {
-    return undefined;
+    return 'unknown';
   }
 
   return systemPreferences.getMediaAccessStatus(value);
 });
 
+ipc.handle(
+  'open-system-media-permissions',
+  async (_event, mediaType: 'camera' | 'microphone') => {
+    if (!OS.isMacOS()) {
+      return;
+    }
+    if (mediaType === 'camera') {
+      await shell.openExternal(
+        'x-apple.systempreferences:com.apple.preference.security?Privacy_Camera'
+      );
+    } else if (mediaType === 'microphone') {
+      await shell.openExternal(
+        'x-apple.systempreferences:com.apple.preference.security?Privacy_Microphone'
+      );
+    } else {
+      throw missingCaseError(mediaType);
+    }
+  }
+);
+
 ipc.handle('get-auto-launch', async () => {
   return app.getLoginItemSettings(await getDefaultLoginItemSettings())
     .openAtLogin;
diff --git a/images/macos-switch.svg b/images/macos-switch.svg
new file mode 100644
index 0000000000..6393b5ff60
--- /dev/null
+++ b/images/macos-switch.svg
@@ -0,0 +1,17 @@
+<svg width="30" height="21" viewBox="0 0 30 21" fill="none" xmlns="http://www.w3.org/2000/svg">
+<rect y="1" width="28" height="17" rx="8.5" fill="#1D87FF"/>
+<g filter="url(#filter0_d_1_1422)">
+<ellipse cx="19.5152" cy="9.50001" rx="6.78788" ry="6.8" fill="white"/>
+</g>
+<defs>
+<filter id="filter0_d_1_1422" x="9.32729" y="0.150012" width="20.3758" height="20.4" filterUnits="userSpaceOnUse" color-interpolation-filters="sRGB">
+<feFlood flood-opacity="0" result="BackgroundImageFix"/>
+<feColorMatrix in="SourceAlpha" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 127 0" result="hardAlpha"/>
+<feOffset dy="0.85"/>
+<feGaussianBlur stdDeviation="1.7"/>
+<feColorMatrix type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.16 0"/>
+<feBlend mode="normal" in2="BackgroundImageFix" result="effect1_dropShadow_1_1422"/>
+<feBlend mode="normal" in="SourceGraphic" in2="effect1_dropShadow_1_1422" result="shape"/>
+</filter>
+</defs>
+</svg>
diff --git a/stylesheets/components/MediaPermissionsModal.scss b/stylesheets/components/MediaPermissionsModal.scss
new file mode 100644
index 0000000000..abf486ea21
--- /dev/null
+++ b/stylesheets/components/MediaPermissionsModal.scss
@@ -0,0 +1,49 @@
+// Copyright 2025 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+@use '../mixins';
+@use '../variables';
+
+.MediaPermissionsModal__headerTitle {
+  padding-block: 10px;
+}
+
+.MediaPermissionsModal__body {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+
+.MediaPermissionsModal h1 {
+  @include mixins.font-title-medium;
+
+  margin-inline: 0;
+  margin-block: 0 6px;
+  line-height: 24px;
+}
+
+.MediaPermissionsModal__subtitle {
+  @include mixins.font-body-1;
+
+  margin-inline: 0;
+  margin-block: 0 20px;
+
+  @include mixins.light-theme {
+    color: rgba(variables.$color-gray-60, 0.8);
+  }
+
+  @include mixins.dark-theme {
+    color: variables.$color-gray-25;
+  }
+}
+
+.MediaPermissionsModal ol {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+
+  margin-inline: 0;
+  margin-block: 0 24px;
+
+  text-align: start;
+}
diff --git a/stylesheets/manifest.scss b/stylesheets/manifest.scss
index e39d93f7db..3d14145fd0 100644
--- a/stylesheets/manifest.scss
+++ b/stylesheets/manifest.scss
@@ -125,6 +125,7 @@
 @use 'components/ListTile.scss';
 @use 'components/LocalDeleteWarningModal.scss';
 @use 'components/MediaEditor.scss';
+@use 'components/MediaPermissionsModal.scss';
 @use 'components/MediaQualitySelector.scss';
 @use 'components/MessageAudio.scss';
 @use 'components/MessageBody.scss';
diff --git a/ts/components/GlobalModalContainer.tsx b/ts/components/GlobalModalContainer.tsx
index a6aebb72c6..8687487422 100644
--- a/ts/components/GlobalModalContainer.tsx
+++ b/ts/components/GlobalModalContainer.tsx
@@ -20,6 +20,7 @@ import { ButtonVariant } from './Button';
 import { ConfirmationDialog } from './ConfirmationDialog';
 import { SignalConnectionsModal } from './SignalConnectionsModal';
 import { WhatsNewModal } from './WhatsNewModal';
+import { MediaPermissionsModal } from './MediaPermissionsModal';
 import type { StartCallData } from './ConfirmLeaveCallModal';
 import type { AttachmentNotAvailableModalType } from './AttachmentNotAvailableModal';
 
@@ -74,6 +75,15 @@ export type PropsType = {
   // ForwardMessageModal
   forwardMessagesProps: ForwardMessagesPropsType | undefined;
   renderForwardMessagesModal: () => JSX.Element;
+  // MediaPermissionsModal
+  mediaPermissionsModalProps:
+    | {
+        mediaType: 'camera' | 'microphone';
+        requestor: 'call' | 'voiceNote';
+      }
+    | undefined;
+  closeMediaPermissionsModal: () => void;
+  openSystemMediaPermissions: (mediaType: 'camera' | 'microphone') => void;
   // MessageRequestActionsConfirmation
   messageRequestActionsConfirmationProps: MessageRequestActionsConfirmationPropsType | null;
   renderMessageRequestActionsConfirmation: () => JSX.Element;
@@ -156,6 +166,10 @@ export function GlobalModalContainer({
   // ForwardMessageModal
   forwardMessagesProps,
   renderForwardMessagesModal,
+  // MediaPermissionsModal
+  mediaPermissionsModalProps,
+  closeMediaPermissionsModal,
+  openSystemMediaPermissions,
   // MessageRequestActionsConfirmation
   messageRequestActionsConfirmationProps,
   renderMessageRequestActionsConfirmation,
@@ -218,6 +232,18 @@ export function GlobalModalContainer({
     return renderForwardMessagesModal();
   }
 
+  // Media Permissions Modal
+  if (mediaPermissionsModalProps) {
+    return (
+      <MediaPermissionsModal
+        i18n={i18n}
+        {...mediaPermissionsModalProps}
+        openSystemMediaPermissions={openSystemMediaPermissions}
+        onClose={closeMediaPermissionsModal}
+      />
+    );
+  }
+
   // The Rest
 
   if (confirmLeaveCallModalState) {
diff --git a/ts/components/MediaPermissionsModal.stories.tsx b/ts/components/MediaPermissionsModal.stories.tsx
new file mode 100644
index 0000000000..1b92c9291d
--- /dev/null
+++ b/ts/components/MediaPermissionsModal.stories.tsx
@@ -0,0 +1,44 @@
+// Copyright 2025 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+import React, { StrictMode } from 'react';
+import { action } from '@storybook/addon-actions';
+import enMessages from '../../_locales/en/messages.json';
+import { type ComponentMeta } from '../storybook/types';
+import { setupI18n } from '../util/setupI18n';
+import type { PropsType } from './MediaPermissionsModal';
+import { MediaPermissionsModal } from './MediaPermissionsModal';
+
+const i18n = setupI18n('en', enMessages);
+
+type TemplateProps = Omit<PropsType, 'i18n' | 'children'>;
+
+function Template(props: TemplateProps) {
+  return (
+    <StrictMode>
+      <MediaPermissionsModal i18n={i18n} {...props} />
+    </StrictMode>
+  );
+}
+
+export default {
+  title: 'Components/MediaPermissionsModal',
+  component: Template,
+  args: {
+    mediaType: 'camera',
+    requestor: 'call',
+    openSystemMediaPermissions: action('onOpenSystemMediaPermissions'),
+    onClose: action('onClose'),
+  },
+} satisfies ComponentMeta<TemplateProps>;
+
+export function Camera(props: TemplateProps): JSX.Element {
+  return <Template {...props} mediaType="camera" />;
+}
+
+export function Microphone(props: TemplateProps): JSX.Element {
+  return <Template {...props} mediaType="microphone" />;
+}
+
+export function VoiceNote(props: TemplateProps): JSX.Element {
+  return <Template {...props} requestor="voiceNote" mediaType="microphone" />;
+}
diff --git a/ts/components/MediaPermissionsModal.tsx b/ts/components/MediaPermissionsModal.tsx
new file mode 100644
index 0000000000..9ef95709cc
--- /dev/null
+++ b/ts/components/MediaPermissionsModal.tsx
@@ -0,0 +1,82 @@
+// Copyright 2025 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React, { useCallback } from 'react';
+
+import { Modal } from './Modal';
+import type { LocalizerType } from '../types/Util';
+import { missingCaseError } from '../util/missingCaseError';
+import { Button } from './Button';
+
+export type PropsType = {
+  i18n: LocalizerType;
+  mediaType: 'camera' | 'microphone';
+  requestor: 'call' | 'voiceNote';
+  openSystemMediaPermissions: (mediaType: 'camera' | 'microphone') => void;
+  onClose: () => void;
+};
+
+export function MediaPermissionsModal({
+  i18n,
+  mediaType,
+  requestor,
+  openSystemMediaPermissions,
+  onClose,
+}: PropsType): JSX.Element {
+  let title: string;
+  if (mediaType === 'camera') {
+    title = i18n('icu:MediaPermissionsModal__title--camera');
+  } else if (mediaType === 'microphone') {
+    title = i18n('icu:MediaPermissionsModal__title--microphone');
+  } else {
+    throw missingCaseError(mediaType);
+  }
+  let subtitle: string;
+  if (requestor === 'call') {
+    if (mediaType === 'camera') {
+      subtitle = i18n('icu:MediaPermissionsModal__subtitle--call--camera');
+    } else if (mediaType === 'microphone') {
+      subtitle = i18n('icu:MediaPermissionsModal__subtitle--call');
+    } else {
+      throw missingCaseError(mediaType);
+    }
+  } else if (requestor === 'voiceNote') {
+    subtitle = i18n('icu:MediaPermissionsModal__subtitle--voice-note');
+  } else {
+    throw missingCaseError(requestor);
+  }
+
+  const onClick = useCallback(
+    () => openSystemMediaPermissions(mediaType),
+    [openSystemMediaPermissions, mediaType]
+  );
+
+  return (
+    <Modal
+      modalName="MediaPermissionsModal"
+      hasXButton
+      i18n={i18n}
+      onClose={onClose}
+      moduleClassName="MediaPermissionsModal"
+    >
+      <div className="MediaPermissionsModal__body">
+        <h1>{title}</h1>
+        <p className="MediaPermissionsModal__subtitle">{subtitle}</p>
+        <ol>
+          <li>
+            {i18n('icu:MediaPermissionsModal__step-1', {
+              buttonName: i18n('icu:MediaPermissionsModal__open'),
+            })}
+          </li>
+          <li>
+            <img alt="" src="images/macos-switch.svg" width={28} height={17} />
+            {i18n('icu:MediaPermissionsModal__step-2')}
+          </li>
+        </ol>
+        <Button onClick={onClick}>
+          {i18n('icu:MediaPermissionsModal__open')}
+        </Button>
+      </div>
+    </Modal>
+  );
+}
diff --git a/ts/services/audioRecorder.ts b/ts/services/audioRecorder.ts
index df7fbd9340..3eb8e0512f 100644
--- a/ts/services/audioRecorder.ts
+++ b/ts/services/audioRecorder.ts
@@ -53,6 +53,11 @@ export class RecorderClass {
       return false;
     }
 
+    await window.reduxActions.globalModals.ensureSystemMediaPermissions(
+      'microphone',
+      'voiceNote'
+    );
+
     this.clear();
 
     this.#context = new AudioContext();
diff --git a/ts/services/calling.ts b/ts/services/calling.ts
index 8dc62c04f0..204b2038f8 100644
--- a/ts/services/calling.ts
+++ b/ts/services/calling.ts
@@ -327,6 +327,27 @@ export type NotifyScreenShareStatusOptionsType = Readonly<
   )
 >;
 
+async function ensureSystemPermissions({
+  hasLocalVideo,
+  hasLocalAudio,
+}: {
+  hasLocalVideo: boolean;
+  hasLocalAudio: boolean;
+}): Promise<void> {
+  if (hasLocalAudio) {
+    await window.reduxActions.globalModals.ensureSystemMediaPermissions(
+      'microphone',
+      'call'
+    );
+  }
+  if (hasLocalVideo) {
+    await window.reduxActions.globalModals.ensureSystemMediaPermissions(
+      'camera',
+      'call'
+    );
+  }
+}
+
 export class CallingClass {
   readonly #videoCapturer: GumVideoCapturer;
 
@@ -502,6 +523,7 @@ export class CallingClass {
     }
 
     log.info('CallingClass.startCallingLobby(): Starting lobby');
+    await ensureSystemPermissions({ hasLocalAudio, hasLocalVideo });
 
     // It's important that this function comes before any calls to
     //   `videoCapturer.enableCapture` or `videoCapturer.enableCaptureAndSend` because of
@@ -522,7 +544,7 @@ export class CallingClass {
     await this.#startDeviceReselectionTimer();
 
     const enableLocalCameraIfNecessary = hasLocalVideo
-      ? () => this.enableLocalCamera()
+      ? () => drop(this.enableLocalCamera())
       : noop;
 
     switch (callMode) {
@@ -833,6 +855,8 @@ export class CallingClass {
     const roomId = getRoomIdFromRootKey(callLinkRootKey);
     log.info('startCallLinkLobby() for roomId', roomId);
 
+    await ensureSystemPermissions({ hasLocalAudio, hasLocalVideo });
+
     await this.#startDeviceReselectionTimer();
 
     const authCredentialPresentation =
@@ -848,7 +872,7 @@ export class CallingClass {
     groupCall.setOutgoingAudioMuted(!hasLocalAudio);
     groupCall.setOutgoingVideoMuted(!hasLocalVideo);
 
-    this.enableLocalCamera();
+    drop(this.enableLocalCamera());
 
     return {
       callMode: CallMode.Adhoc,
@@ -892,6 +916,17 @@ export class CallingClass {
       return;
     }
 
+    try {
+      await ensureSystemPermissions({ hasLocalAudio, hasLocalVideo });
+    } catch (error) {
+      log.error(
+        `${logId}: failed to ensure system permissions`,
+        Errors.toLogFormat(error)
+      );
+      this.stopCallingLobby();
+      return;
+    }
+
     log.info(`${logId}: Getting call settings`);
     // Check state after awaiting to debounce call button.
     if (RingRTC.call && RingRTC.call.state !== CallState.Ended) {
@@ -1239,6 +1274,7 @@ export class CallingClass {
       );
     }
 
+    await ensureSystemPermissions({ hasLocalAudio, hasLocalVideo });
     await this.#startDeviceReselectionTimer();
 
     const groupCall = this.connectGroupCall(conversationId, {
@@ -1577,6 +1613,7 @@ export class CallingClass {
       );
     }
 
+    await ensureSystemPermissions({ hasLocalAudio, hasLocalVideo });
     await this.#startDeviceReselectionTimer();
 
     const callLinkRootKey = CallLinkRootKey.parse(rootKey);
@@ -1924,6 +1961,10 @@ export class CallingClass {
 
     const haveMediaPermissions = await this.#requestPermissions(asVideoCall);
     if (haveMediaPermissions) {
+      await ensureSystemPermissions({
+        hasLocalAudio: true,
+        hasLocalVideo: asVideoCall,
+      });
       await this.#startDeviceReselectionTimer();
       RingRTC.setVideoCapturer(callId, this.#videoCapturer);
       RingRTC.setVideoRenderer(callId, this.videoRenderer);
@@ -2024,13 +2065,21 @@ export class CallingClass {
     }
   }
 
-  setOutgoingVideo(conversationId: string, enabled: boolean): void {
+  async setOutgoingVideo(
+    conversationId: string,
+    enabled: boolean
+  ): Promise<void> {
     const call = getOwn(this.#callsLookup, conversationId);
     if (!call) {
       log.warn('Trying to set outgoing video for a non-existent call');
       return;
     }
 
+    await window.reduxActions.globalModals.ensureSystemMediaPermissions(
+      'camera',
+      'call'
+    );
+
     if (call instanceof Call) {
       RingRTC.setOutgoingVideo(call.callId, enabled);
     } else if (call instanceof GroupCall) {
@@ -2083,11 +2132,13 @@ export class CallingClass {
           },
         })
       );
-      this.setOutgoingVideo(conversationId, true);
+      drop(this.setOutgoingVideo(conversationId, true));
     } else {
-      this.setOutgoingVideo(
-        conversationId,
-        this.#hadLocalVideoBeforePresenting ?? hasLocalVideo
+      drop(
+        this.setOutgoingVideo(
+          conversationId,
+          this.#hadLocalVideoBeforePresenting ?? hasLocalVideo
+        )
       );
       this.#hadLocalVideoBeforePresenting = undefined;
     }
@@ -2405,8 +2456,12 @@ export class CallingClass {
     RingRTC.setAudioOutput(device.index);
   }
 
-  enableLocalCamera(): void {
-    drop(this.#videoCapturer.enableCapture());
+  async enableLocalCamera(): Promise<void> {
+    await window.reduxActions.globalModals.ensureSystemMediaPermissions(
+      'camera',
+      'call'
+    );
+    await this.#videoCapturer.enableCapture();
   }
 
   async enableCaptureAndSend(
diff --git a/ts/state/ducks/calling.ts b/ts/state/ducks/calling.ts
index 1a7913ca94..00b564adfc 100644
--- a/ts/state/ducks/calling.ts
+++ b/ts/state/ducks/calling.ts
@@ -1888,9 +1888,12 @@ function setLocalVideo(
         isGroupOrAdhocCallState(activeCall) ||
         (activeCall.callMode === CallMode.Direct && activeCall.callState)
       ) {
-        calling.setOutgoingVideo(activeCall.conversationId, payload.enabled);
+        await calling.setOutgoingVideo(
+          activeCall.conversationId,
+          payload.enabled
+        );
       } else if (payload.enabled) {
-        calling.enableLocalCamera();
+        await calling.enableLocalCamera();
       } else {
         calling.disableLocalVideo();
       }
diff --git a/ts/state/ducks/globalModals.ts b/ts/state/ducks/globalModals.ts
index 68b56f77be..1ba39aaa87 100644
--- a/ts/state/ducks/globalModals.ts
+++ b/ts/state/ducks/globalModals.ts
@@ -3,6 +3,7 @@
 
 import type { ThunkAction } from 'redux-thunk';
 import type { ReadonlyDeep } from 'type-fest';
+import OS from '../../util/os/osMain';
 import type { ExplodePromiseResultType } from '../../util/explodePromise';
 import type {
   GroupV2PendingMemberType,
@@ -27,6 +28,8 @@ import type { BoundActionCreatorsMapObject } from '../../hooks/useBoundActions';
 import { longRunningTaskWrapper } from '../../util/longRunningTaskWrapper';
 import { useBoundActions } from '../../hooks/useBoundActions';
 import { isGroupV1 } from '../../util/whatTypeOfConversation';
+import { sleep } from '../../util/sleep';
+import { SECOND } from '../../util/durations';
 import { getGroupMigrationMembers } from '../../groups';
 import {
   MESSAGE_CHANGED,
@@ -122,6 +125,11 @@ export type GlobalModalsStateType = ReadonlyDeep<{
   messageRequestActionsConfirmationProps: MessageRequestActionsConfirmationPropsType | null;
   notePreviewModalProps: NotePreviewModalPropsType | null;
   usernameOnboardingState: UsernameOnboardingState;
+  mediaPermissionsModalProps?: {
+    mediaType: 'camera' | 'microphone';
+    requestor: 'call' | 'voiceNote';
+    abortController: AbortController;
+  };
   profileEditorHasError: boolean;
   profileEditorInitialEditState: ProfileEditorEditState | undefined;
   safetyNumberChangedBlockingData?: SafetyNumberChangedBlockingDataType;
@@ -185,6 +193,10 @@ const CLOSE_EDIT_HISTORY_MODAL = 'globalModals/CLOSE_EDIT_HISTORY_MODAL';
 const TOGGLE_USERNAME_ONBOARDING = 'globalModals/TOGGLE_USERNAME_ONBOARDING';
 const TOGGLE_CONFIRM_LEAVE_CALL_MODAL =
   'globalModals/TOGGLE_CONFIRM_LEAVE_CALL_MODAL';
+const CLOSE_MEDIA_PERMISSIONS_MODAL =
+  'globalModals/CLOSE_MEDIA_PERMISSIONS_MODAL';
+const SHOW_MEDIA_PERMISSIONS_MODAL =
+  'globalModals/SHOW_MEDIA_PERMISSIONS_MODAL';
 
 export type ContactModalStateType = ReadonlyDeep<{
   contactId: string;
@@ -361,6 +373,19 @@ export type ShowErrorModalActionType = ReadonlyDeep<{
   };
 }>;
 
+type CloseMediaPermissionsModalActionType = ReadonlyDeep<{
+  type: typeof CLOSE_MEDIA_PERMISSIONS_MODAL;
+}>;
+
+type ShowMediaPermissionsModalActionType = ReadonlyDeep<{
+  type: typeof SHOW_MEDIA_PERMISSIONS_MODAL;
+  payload: {
+    mediaType: 'camera' | 'microphone';
+    requestor: 'call' | 'voiceNote';
+    abortController: AbortController;
+  };
+}>;
+
 type ToggleEditNicknameAndNoteModalActionType = ReadonlyDeep<{
   type: typeof TOGGLE_EDIT_NICKNAME_AND_NOTE_MODAL;
   payload: EditNicknameAndNoteModalPropsType | null;
@@ -393,6 +418,7 @@ type CloseEditHistoryModalActionType = ReadonlyDeep<{
 export type GlobalModalsActionType = ReadonlyDeep<
   | CloseEditHistoryModalActionType
   | CloseErrorModalActionType
+  | CloseMediaPermissionsModalActionType
   | CloseGV2MigrationDialogActionType
   | CloseShortcutGuideModalActionType
   | CloseStickerPackPreviewActionType
@@ -409,6 +435,7 @@ export type GlobalModalsActionType = ReadonlyDeep<
   | ShowContactModalActionType
   | ShowEditHistoryModalActionType
   | ShowErrorModalActionType
+  | ShowMediaPermissionsModalActionType
   | ToggleEditNicknameAndNoteModalActionType
   | ToggleMessageRequestActionsConfirmationActionType
   | ShowSendAnywayDialogActionType
@@ -443,6 +470,7 @@ export const actions = {
   closeGV2MigrationDialog,
   closeShortcutGuideModal,
   closeStickerPackPreview,
+  closeMediaPermissionsModal,
   hideAttachmentNotAvailableModal,
   hideBlockingSafetyNumberChangeDialog,
   hideContactModal,
@@ -454,6 +482,7 @@ export const actions = {
   showContactModal,
   showEditHistoryModal,
   showErrorModal,
+  ensureSystemMediaPermissions,
   toggleEditNicknameAndNoteModal,
   toggleMessageRequestActionsConfirmation,
   showGV2MigrationDialog,
@@ -937,6 +966,63 @@ function showErrorModal({
   };
 }
 
+function closeMediaPermissionsModal(): CloseMediaPermissionsModalActionType {
+  return {
+    type: CLOSE_MEDIA_PERMISSIONS_MODAL,
+  };
+}
+
+const MEDIA_PERMISSIONS_POLL_INTERVAL = SECOND;
+
+export function ensureSystemMediaPermissions(
+  mediaType: 'camera' | 'microphone',
+  requestor: 'call' | 'voiceNote'
+): ThunkAction<
+  void,
+  RootStateType,
+  unknown,
+  ShowMediaPermissionsModalActionType | CloseMediaPermissionsModalActionType
+> {
+  return async dispatch => {
+    // Only macOS supported at the moment
+    if (!OS.isMacOS()) {
+      return;
+    }
+
+    const status = await window.IPC.getMediaAccessStatus(mediaType);
+    if (status !== 'denied') {
+      return;
+    }
+
+    const logId = `ensureSystemMediaPermissions(${mediaType}, ${requestor})`;
+    log.warn(`${logId}: permission denied, showing UI`);
+
+    const abortController = new AbortController();
+    dispatch({
+      type: SHOW_MEDIA_PERMISSIONS_MODAL,
+      payload: { mediaType, requestor, abortController },
+    });
+
+    const { signal } = abortController;
+    while (!signal.aborted) {
+      // eslint-disable-next-line no-await-in-loop
+      await sleep(MEDIA_PERMISSIONS_POLL_INTERVAL, signal);
+
+      // eslint-disable-next-line no-await-in-loop
+      const updatedStatus = await window.IPC.getMediaAccessStatus(mediaType);
+      if (signal.aborted) {
+        throw new Error('ensureSystemMediaPermissions: modal dismissed');
+      }
+
+      if (updatedStatus !== 'denied') {
+        break;
+      }
+    }
+
+    dispatch({ type: CLOSE_MEDIA_PERMISSIONS_MODAL });
+  };
+}
+
 function toggleEditNicknameAndNoteModal(
   payload: EditNicknameAndNoteModalPropsType | null
 ): ToggleEditNicknameAndNoteModalActionType {
@@ -1416,5 +1502,20 @@ export function reducer(
     }
   }
 
+  if (action.type === CLOSE_MEDIA_PERMISSIONS_MODAL) {
+    state.mediaPermissionsModalProps?.abortController.abort();
+    return {
+      ...state,
+      mediaPermissionsModalProps: undefined,
+    };
+  }
+
+  if (action.type === SHOW_MEDIA_PERMISSIONS_MODAL) {
+    return {
+      ...state,
+      mediaPermissionsModalProps: action.payload,
+    };
+  }
+
   return state;
 }
diff --git a/ts/state/smart/GlobalModalContainer.tsx b/ts/state/smart/GlobalModalContainer.tsx
index 9fbedb1dbc..8a3dc982e1 100644
--- a/ts/state/smart/GlobalModalContainer.tsx
+++ b/ts/state/smart/GlobalModalContainer.tsx
@@ -126,6 +126,7 @@ export const SmartGlobalModalContainer = memo(
       editNicknameAndNoteModalProps,
       errorModalProps,
       forwardMessagesProps,
+      mediaPermissionsModalProps,
       messageRequestActionsConfirmationProps,
       notePreviewModalProps,
       isProfileEditorVisible,
@@ -142,6 +143,7 @@ export const SmartGlobalModalContainer = memo(
 
     const {
       closeErrorModal,
+      closeMediaPermissionsModal,
       hideUserNotFoundModal,
       hideWhatsNewModal,
       toggleSignalConnectionsModal,
@@ -214,6 +216,9 @@ export const SmartGlobalModalContainer = memo(
         messageRequestActionsConfirmationProps={
           messageRequestActionsConfirmationProps
         }
+        mediaPermissionsModalProps={mediaPermissionsModalProps}
+        closeMediaPermissionsModal={closeMediaPermissionsModal}
+        openSystemMediaPermissions={window.IPC.openSystemMediaPermissions}
         notePreviewModalProps={notePreviewModalProps}
         hasSafetyNumberChangeModal={hasSafetyNumberChangeModal}
         hideUserNotFoundModal={hideUserNotFoundModal}
diff --git a/ts/util/createIPCEvents.ts b/ts/util/createIPCEvents.ts
index 10341db241..1a6f451c05 100644
--- a/ts/util/createIPCEvents.ts
+++ b/ts/util/createIPCEvents.ts
@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 
 import { ipcRenderer } from 'electron';
+import type { SystemPreferences } from 'electron';
 import type { AudioDevice } from '@signalapp/ringrtc';
 import { noop } from 'lodash';
 
@@ -115,7 +116,7 @@ export type IPCEventsCallbacksType = {
   getConversationsWithCustomColor: (x: string) => Array<ConversationType>;
   getMediaAccessStatus: (
     mediaType: 'screen' | 'microphone' | 'camera'
-  ) => Promise<string | unknown>;
+  ) => Promise<ReturnType<SystemPreferences['getMediaAccessStatus']>>;
   installStickerPack: (packId: string, key: string) => Promise<void>;
   isPrimary: () => boolean;
   removeCustomColor: (x: string) => void;
diff --git a/ts/window.d.ts b/ts/window.d.ts
index caefe62fc9..fe912e0943 100644
--- a/ts/window.d.ts
+++ b/ts/window.d.ts
@@ -5,6 +5,7 @@
 
 import type { Store } from 'redux';
 import type * as Backbone from 'backbone';
+import type { SystemPreferences } from 'electron';
 import type PQueue from 'p-queue/dist';
 import type { assert } from 'chai';
 import type { PhoneNumber, PhoneNumberFormat } from 'google-libphonenumber';
@@ -68,8 +69,11 @@ export type IPCType = {
   getAutoLaunch: () => Promise<boolean>;
   getMediaAccessStatus: (
     mediaType: 'screen' | 'microphone' | 'camera'
-  ) => Promise<string | undefined>;
+  ) => Promise<ReturnType<SystemPreferences['getMediaAccessStatus']>>;
   getMediaCameraPermissions: () => Promise<boolean>;
+  openSystemMediaPermissions: (
+    mediaType: 'microphone' | 'camera'
+  ) => Promise<void>;
   getMediaPermissions: () => Promise<boolean>;
   logAppLoadedEvent?: (options: { processedCount?: number }) => void;
   readyForUpdates: () => void;
diff --git a/ts/windows/main/phase1-ipc.ts b/ts/windows/main/phase1-ipc.ts
index 192c782002..3900fed0af 100644
--- a/ts/windows/main/phase1-ipc.ts
+++ b/ts/windows/main/phase1-ipc.ts
@@ -88,6 +88,8 @@ const IPC: IPCType = {
   getAutoLaunch: () => ipc.invoke('get-auto-launch'),
   getMediaAccessStatus: mediaType =>
     ipc.invoke('get-media-access-status', mediaType),
+  openSystemMediaPermissions: mediaType =>
+    ipc.invoke('open-system-media-permissions', mediaType),
   getMediaPermissions: () => ipc.invoke('settings:get:mediaPermissions'),
   getMediaCameraPermissions: () =>
     ipc.invoke('settings:get:mediaCameraPermissions'),