Introduction
The lock screen is the natural place to switch users on a Mac. When one person steps away from the computer, the screen locks, and the next person approaches the login window and selects their account. This is Fast User Switching in action—no one needs to log out, no one’s apps close, and everyone’s session remains running in the background.
This guide covers everything you can do at the login window: selecting an account, using Touch ID, entering a password, switching to the guest account, and using accessibility options. For the keyboard shortcuts that get you to the lock screen, see our Mac user switching shortcuts guide . For the overall setup, including how to enable Fast User Switching in the first place, our how to switch users on a Mac guide has the full picture.
Reaching the Lock Screen
To switch users on a Mac from the lock screen, you first need to get there. The fastest method depends on your situation:
- Already logged in: Press Control + Command + Q. Your screen locks instantly but your session stays active.
- After the screensaver activates: Move the mouse or press any key. The screensaver dismisses and the login window appears.
- After restart or power‑on: The Mac boots directly to the login screen, showing all user accounts.
The login window displays a list of user accounts on the left (or their icons at the center, depending on your macOS version and settings). Below the list is the guest account option if you have enabled Guest User in System Settings.
Selecting an Account and Authenticating
Once you’re at the login screen, you have several ways to switch users on a Mac:
- Click the user’s name or icon to select that account. A password field appears.
- Touch ID: If your Mac has a Touch ID sensor and your fingerprint is registered, simply place your finger on the sensor. macOS automatically identifies which account the fingerprint belongs to and switches directly—you never see a password field.
- Apple Watch: If you have an Apple Watch paired with your Mac and both devices are on the same Wi‑Fi, your watch can unlock your account when you’re at the login screen. For setup instructions, see our biometric user switching guide .
If you type a password, press Return. The screen transitions to your desktop, and all your previously open apps and documents are exactly as you left them.
Switching to the Guest Account
The guest account is a temporary user that doesn’t require a password. To switch to it:
- At the login screen, click Guest User.
- The guest session opens immediately—no password needed.
- When the guest logs out, all files and browsing history created during that session are deleted.
The guest account must be enabled first. Go to System Settings > Users & Groups > Guest User and toggle “Allow guests to log in to this computer” on. If you don’t see the guest option at the login screen, it hasn’t been enabled.
Accessibility Options at the Login Screen
The login screen includes accessibility features that help you switch users on a Mac if you have visual, motor, or hearing needs. Click the Accessibility icon (a person in a circle, usually in the bottom‑right corner of the screen) to access:
- VoiceOver (screen reader)
- Zoom
- On‑Screen Keyboard
- Sticky Keys
- Switch Control
These settings are applied immediately and persist across user switches. If you need these features enabled by default, go to System Settings > Lock Screen > Accessibility Options and choose which features appear at the login window.
What Happens to the Other User’s Session
One of the most important aspects of Mac lock screen user switching is that the other user’s session remains fully active. All their apps, documents, and browser tabs stay open. They can even have background tasks—like a video export or a file download—running while you use the computer under your own account. This is the power of Fast User Switching and the reason you should never shut down the computer to switch users.
Keep in mind that both active sessions share system resources (RAM, CPU). If one user runs heavy software, the other user may experience slower performance until those apps are closed.
Frequently Asked Questions
Can I switch to any user from the lock screen?
Yes. All accounts on the Mac appear at the login screen, including the guest account if enabled.
What if I forget my password at the login screen?
Click the question mark icon or the “Reset Password” link. You can reset using your Apple ID or, on Apple Silicon Macs, by restarting to Recovery Mode.
Does the login screen show which users are currently logged in?
Yes. A checkmark or “Logged In” indicator appears next to accounts that have an active session running in the background.