Fast User Switching is a macOS feature that allows multiple users to remain logged into the same Mac simultaneously. When enabled, a menu appears in the top-right corner of the menu bar (often displaying a generic profile silhouette or the current user’s full name), allowing you to quickly suspend your session and switch to another user’s desktop without having to close your applications or fully log out. While convenient for shared family computers, it is completely unnecessary for single-user machines. Furthermore, leaving multiple user accounts logged in concurrently consumes massive amounts of RAM and CPU resources, as all background applications for both users remain active.
This guide explains how to completely disable Fast User Switching on a Mac, removing the menu bar icon and forcing users to properly log out before switching accounts.
Disable Fast User Switching via System Settings
Apple allows administrators to disable this feature directly through the graphical user interface, instantly reclaiming the menu bar space.
- Click the Apple Logo located in the top-left corner of your Mac’s screen.
- Select System Settings (or System Preferences on older versions of macOS) from the drop-down menu.
- In the left-hand navigation sidebar, scroll down and click on Control Centre. (If you are on macOS Monterey or earlier, click on Users & Groups, then click Login Options).
- In the Control Centre menu, scroll down until you find the section dedicated to Fast User Switching.
- You will see an option for Show in Menu Bar. Click the drop-down menu next to it and select Don’t Show.
- Next, find the option for Show in Control Centre and toggle the switch to the Off position.
The profile icon will immediately vanish from your menu bar at the top of the screen.
The Impact of Disabling the Feature
Once Fast User Switching is disabled, the core behaviour of macOS changes to enforce strict session management.
If a secondary user wishes to access their account, you can no longer simply click their name. You must explicitly click the Apple Logo, select Log Out [Your Name], and confirm the action. This forces your Mac to cleanly terminate all of your running applications, flush your data from the system RAM, and return to the primary lock screen. This guarantees that when the secondary user logs in, they have access to 100% of the Mac’s hardware resources, without your background tasks dragging down the system performance.