How to lock Telegram on a Mac
Short answer: Telegram already has a native Passcode Lock built into its Mac app — more than most messaging apps offer — but it comes with real gaps, and it only protects Telegram. Here's what it covers and what closes the rest.
What Telegram's own Passcode Lock does
Under Settings → Privacy and Security, Telegram lets you set a local passcode and an auto-lock timer that locks the whole Telegram window after a period of inactivity. It's a real, built-in feature, and if you only use Telegram, it's worth turning on regardless of anything else.
Where it stops
Telegram's Passcode Lock only takes a typed passcode on Mac, not Touch ID, so it's slower to use and easier to shoulder-surf. Users have long reported that notification previews can still show message text even while the app is locked — this remains an open item in Telegram's own bug tracker. And like any app-specific lock, it only protects Telegram; Mail, Notes, Photos, and everything else on your Mac stay exactly as open as before.
What doesn't work either
The general workarounds people try for other apps don't help here either: a second user account means logging out just to hand someone the Mac; FileVault only protects the disk while it's powered off, not while you're logged in; and Screen Time is built for managing a child's account, not shielding one app on your own Mac.
What actually works
Shoo! can replace Telegram's own passcode with Touch ID (or Apple Watch, or a private backup password), and it locks by ending Telegram's process rather than just dimming the window — so there's nothing left running to switch back into. The same method also covers every other app on your Mac, not just Telegram.
Try it free for 7 days — full functionality, no credit card, $17.99 once if you keep it.
Frequently asked
Should I use Telegram's Passcode Lock or Shoo!?
Telegram's Passcode Lock is a reasonable baseline if Telegram is the only app you care about protecting. Shoo! covers Telegram plus every other app on your Mac with one Touch ID unlock instead of a typed passcode per app.
Does Telegram's lock stop notification previews?
Not reliably — users have long reported message previews still appearing even while Telegram is locked, which remains an open item in Telegram's own bug tracker.
Can Shoo! replace Telegram's built-in passcode?
Yes — locking Telegram with Shoo! ends its process and reopens it with Touch ID, Apple Watch, or a private backup password, so you don't need to rely on Telegram's own typed passcode at all.
Can I open Telegram with Touch ID after locking it with Shoo!?
Yes. Once Telegram is locked it only opens after Touch ID succeeds. If your Mac has no Touch ID, you can confirm with Apple Watch (double-press the side button) or a private backup password that is separate from your Mac login password.
Is Telegram still protected if I switch desktops or come back to it later?
Yes. Shoo! does not draw an overlay or check only at launch. It ends the Telegram process when locked, so switching Spaces or returning to the app later can't show what was on screen. It reopens only after you verify.