clarify activity bar action menu layout

refs #40262

src/vs/workbench/browser/parts/activitybar/activitybarActions.ts

@@ -246,15 +246,15 @@ export class AccountsActionViewItem extends ActivityActionViewItem {
 		const accountsActions: IAction[] = [];
 		const accountsMenu = this.menuService.createMenu(MenuId.AccountsContext, this.contextKeyService);
 		const actionsDisposable = createAndFillInActionBarActions(accountsMenu, undefined, { primary: [], secondary: accountsActions });
-		const native = getTitleBarStyle(this.configurationService, this.environmentService) === 'native';
+		const customOrMac = getTitleBarStyle(this.configurationService, this.environmentService) !== 'native' || isMacintosh; // using the location logic on mac helps with #40262
 		const position = this.configurationService.getValue('workbench.sideBar.location');
 
 		const containerPosition = DOM.getDomNodePagePosition(this.container);
 		const location = { x: containerPosition.left + (position === 'left' ? containerPosition.width : 0), y: containerPosition.top };
 		const actions = await this.getActions(accountsMenu);
 		this.contextMenuService.showContextMenu({
-			getAnchor: () => !native ? location : e || this.container,
-			anchorAlignment: !native ? (position === 'left' ? AnchorAlignment.RIGHT : AnchorAlignment.LEFT) : undefined,
+			getAnchor: () => customOrMac ? location : e || this.container,
+			anchorAlignment: customOrMac ? (position === 'left' ? AnchorAlignment.RIGHT : AnchorAlignment.LEFT) : undefined,
 			getActions: () => actions,
 			onHide: () => {
 				accountsMenu.dispose();
@@ -308,14 +308,14 @@ export class GlobalActivityActionViewItem extends ActivityActionViewItem {
 		const globalActivityActions: IAction[] = [];
 		const globalActivityMenu = this.menuService.createMenu(MenuId.GlobalActivity, this.contextKeyService);
 		const actionsDisposable = createAndFillInActionBarActions(globalActivityMenu, undefined, { primary: [], secondary: globalActivityActions });
-		const native = getTitleBarStyle(this.configurationService, this.environmentService) === 'native';
+		const customOrMac = getTitleBarStyle(this.configurationService, this.environmentService) !== 'native' || isMacintosh; // using the location logic on mac helps with #40262
 		const position = this.configurationService.getValue('workbench.sideBar.location');
 
 		const containerPosition = DOM.getDomNodePagePosition(this.container);
 		const location = { x: containerPosition.left + (position === 'left' ? containerPosition.width : 0), y: containerPosition.top + containerPosition.height };
 		this.contextMenuService.showContextMenu({
-			getAnchor: () => !native ? location : e || this.container,
-			anchorAlignment: !native ? (position === 'left' ? AnchorAlignment.RIGHT : AnchorAlignment.LEFT) : undefined,
+			getAnchor: () => customOrMac ? location : e || this.container,
+			anchorAlignment: customOrMac ? (position === 'left' ? AnchorAlignment.RIGHT : AnchorAlignment.LEFT) : undefined,
 			getActions: () => globalActivityActions,
 			onHide: () => {
 				globalActivityMenu.dispose();