check if mac

Author: meganrogge

src/vs/workbench/contrib/terminalContrib/accessibility/browser/textAreaSyncAddon.ts

@@ -10,6 +10,7 @@ import { ITerminalLogService } from 'vs/platform/terminal/common/terminal';
 import type { Terminal, ITerminalAddon } from 'xterm';
 import { debounce } from 'vs/base/common/decorators';
 import { addDisposableListener } from 'vs/base/browser/dom';
+import { isMacintosh } from 'vs/base/common/platform';
 
 export interface ITextAreaData {
 	content: string;
@@ -100,9 +101,10 @@ export class TextAreaSyncAddon extends Disposable implements ITerminalAddon {
 			this._logService.debug(`TextAreaSyncAddon#updateCommandAndCursor: no line`);
 			return;
 		}
-		if (!!currentCommand) {
-			this._currentCommand = commandLine.substring(currentCommand.commandStartX ?? 0);
-			this._cursorX = buffer.cursorX - (currentCommand.commandStartX ?? 0);
+		const startX = isMacintosh ? currentCommand.commandStartX : 0;
+		if (!!currentCommand && !!startX) {
+			this._currentCommand = commandLine.substring(startX);
+			this._cursorX = buffer.cursorX - startX;
 		} else {
 			this._currentCommand = undefined;
 			this._cursorX = undefined;