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fix: MacOS 26 Tahoe - stop overriding private cornerMask API to fix WindowServer GPU load (#48400)

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fix: MacOS 26 Tahoe - stop overriding private cornerMask API to fix WindowServer GPU load (#48376)

fix: macOS stop overriding private cornerMask API to fix WindowServer GPU load spike

Electron fetched a custom `_cornerMask` for `ElectronNSWindow` to smooth
vibrancy corners. On macOS 15 (Tahoe) that private hook forces the window
shadow to be rendered from a fully transparent surface, causing the
WindowServer GPU load regression. Remove the `cornerMask` property and
the `_cornerMask` override so we stay on Apple’s default shadow path.

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: avarayr <7735415+avarayr@users.noreply.github.com>
This commit is contained in:
trop[bot] 2025-09-27 10:30:52 -07:00 • committed by GitHub
commit 9a2b4f84be
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shell/browser/ui/cocoa/electron_ns_window.h
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@ -40,7 +40,6 @@ class ElectronNativeWindowObserver;
@property BOOL disableAutoHideCursor;
@property BOOL disableKeyOrMainWindow;
@property(nonatomic, retain) NSVisualEffectView* vibrantView;
@property(nonatomic, retain) NSImage* cornerMask;
- (id)initWithShell:(electron::NativeWindowMac*)shell
styleMask:(NSUInteger)styleMask;
- (void)cleanup;
@ -48,7 +47,6 @@ class ElectronNativeWindowObserver;
- (id)accessibilityFocusedUIElement;
- (NSRect)originalContentRectForFrameRect:(NSRect)frameRect;
- (BOOL)toggleFullScreenMode:(id)sender;
- (NSImage*)_cornerMask;
- (void)disableHeadlessMode;
@end