diff --git a/chrome/content/zotero-platform/mac/overlay.css b/chrome/content/zotero-platform/mac/overlay.css
index f43a6879f9..77dc2e371f 100644
--- a/chrome/content/zotero-platform/mac/overlay.css
+++ b/chrome/content/zotero-platform/mac/overlay.css
@@ -378,9 +378,7 @@
 #zotero-collections-splitter[state=collapsed] > grippy, #zotero-items-splitter[state=collapsed] > grippy
 {
 	-moz-appearance: none;
-	background-image: url("chrome://zotero/skin/mac/vgrippy.png");
-	background-position: center;
-	background-repeat: no-repeat;
+	background: url(chrome://zotero/skin/mac/vgrippy.png) center/auto 8px no-repeat;
 	width: 8px;
 }
 
@@ -399,9 +397,7 @@
 #zotero-tags-splitter > grippy
 {
 	-moz-appearance: none;
-	background-image: url("chrome://zotero/skin/mac/hgrippy.png");
-	background-position: center;
-	background-repeat: no-repeat;
+	background: url(chrome://zotero/skin/mac/hgrippy.png) center/auto 8px no-repeat;
 	height: 8px;
 }
 
@@ -502,6 +498,8 @@ treechildren::-moz-tree-image {
 	.zotero-tb-button:-moz-window-inactive,.zotero-tb-button:-moz-window-inactive:first-child,.zotero-tb-button:-moz-window-inactive:last-child  { background: url("chrome://zotero/skin/mac/menubutton-end-inactive-window@2x.png") right center/auto 24px no-repeat; }
 	.zotero-tb-button[open="true"],.zotero-tb-button:not([disabled="true"]):hover:active  { background: url("chrome://zotero/skin/mac/menubutton-end-pressed@2x.png") right center/auto 24px no-repeat; }
 	.zotero-tb-button[open="true"] > .toolbarbutton-icon,.zotero-tb-button:not([disabled="true"]):hover:active > .toolbarbutton-icon  { background: url("chrome://zotero/skin/mac/menubutton-start-pressed@2x.png") left center/auto 24px no-repeat; }
+	#zotero-collections-splitter[state=collapsed] > grippy, #zotero-items-splitter[state=collapsed] > grippy { background: url(chrome://zotero/skin/mac/vgrippy@2x.png) center/auto 8px no-repeat; }
+	#zotero-tags-splitter > grippy { background: url(chrome://zotero/skin/mac/hgrippy@2x.png) center/auto 8px no-repeat; }
 	#zotero-tb-advanced-search { list-style-image: url('chrome://zotero/skin/mac/toolbar-advanced-search@2x.png'); }
 	#zotero-tb-note-add { list-style-image: url('chrome://zotero/skin/mac/toolbar-note-add@2x.png'); }
 }