diff --git a/electron/lockscreen.ts b/electron/lockscreen.ts
index 9da10460ad..90e57c57ee 100644
--- a/electron/lockscreen.ts
+++ b/electron/lockscreen.ts
@@ -1,9 +1,15 @@
 import { exec } from 'child_process';
 
+// NOTE: keep as a template literal so prettier cannot strip backslash escapes
+// and re-break the osascript argument (see issue #7217). CGSession was removed
+// in macOS Big Sur, so modern macOS relies on the Ctrl+Cmd+Q fallback.
+const DARWIN_LOCK_CMD =
+  `(/System/Library/CoreServices/"Menu Extras"/User.menu/Contents/Resources/CGSession -suspend)` +
+  ` || (osascript -e 'tell application "System Events" to keystroke "q" using {control down, command down}')`;
+
 export const lockscreen = (cb?: (err: unknown, stdout: string) => void): void => {
   const lockCommands = {
-    darwin:
-      '(/System/Library/CoreServices/"Menu Extras"/User.menu/Contents/Resources/CGSession -suspend) || (osascript -e "tell application "System Events" to keystroke "q" using {control down, command down}")',
+    darwin: DARWIN_LOCK_CMD,
     win32: 'rundll32.exe user32.dll, LockWorkStation',
     linux:
       '(hash gnome-screensaver-command 2>/dev/null && gnome-screensaver-command -l) || (hash dm-tool 2>/dev/null && dm-tool lock) || (qdbus org.freedesktop.ScreenSaver /ScreenSaver Lock)',