Fast User Switching is one of the most underrated features in macOS. It lets two or more people share a single Mac, each with their own account, desktop, files, and open apps, and jump between them in about a second, without anyone having to log out or close their work. It is perfect for a family Mac in the kitchen, a shared machine at a small business, or a front-desk computer that a few people take turns on.
This guide walks through turning it on, adding accounts, using the menu-bar switcher, and a few things to know before you hand the keyboard to someone else. It applies to macOS Ventura, Sonoma, and Sequoia (the steps are nearly identical on older versions, just under System Preferences instead of System Settings).
What Fast User Switching actually does
Normally, when a second person wants to use a Mac, the first person has to log out, quitting every app and closing every document. Fast User Switching skips that. The first account stays logged in and running in the background while a second person logs into their own account on top. Switch back and everything is exactly where it was, unsaved work included.
Each account is fully separate: its own Desktop and Documents, its own browser history and bookmarks, its own apps and settings, its own iCloud and Apple ID. One person cannot see another person’s files (unless they are stored in the shared /Users/Shared folder). It is the right way to share a Mac, far better than everyone piling into one login.
Step 1: Add a second user account
You need at least two accounts before switching makes sense. To add one:
- Open System Settings (the gear icon in the Dock or under the Apple menu).
- Scroll down and click Users & Groups.
- Click Add Account… (you may be asked for your admin password).
- Choose the account type: Standard for most people, or Administrator if they need to install software and change system settings.
- Fill in a full name, account name, and password, then click Create User.
Repeat for each person who will use the Mac. If this is a used Mac you just bought, our guide on how to set up a used MacBook covers creating that first clean account from scratch.
Step 2: Turn on the Fast User Switching menu
The switcher lives in the menu bar at the top-right of the screen. To enable it:
- Open System Settings → Control Center.
- Scroll to the Fast User Switching section.
- Set Show in Menu Bar to on.
- Under Show in Menu Bar, choose how it appears: Full Name, Account Name, or a small Icon (the icon saves space).
On older macOS versions this toggle is under System Preferences → Users & Groups → Login Options → Show fast user switching menu as.
Step 3: Switch between accounts
Click your name (or the icon) in the top-right menu bar. A drop-down lists every account on the Mac. Click the person you want to switch to, enter their password, and macOS slides over to their login, often with a smooth cube animation. Your own session keeps running untouched in the background.
To switch back, click the menu again and pick your name. You can also lock the screen without switching by choosing Login Window… from the same menu, which sends everyone to the password screen while keeping all sessions open.
Good habits when sharing a Mac
- Give kids a Standard account, not Admin. Pair it with Screen Time to set limits and app restrictions on their login only.
- Each person should sign in with their own Apple ID. This keeps iCloud photos, Messages, and purchases separate. See how to sign in with an Apple ID on a Mac.
- Use the Shared folder for files everyone needs. Anything in /Users/Shared is visible to all accounts; everything else stays private.
- Do not force-shut-down with sessions open. Other logged-in users can have unsaved work. macOS will warn you if you try to restart while other accounts are active.
- Forgot a password for one of the accounts? Our Mac password reset guide walks through recovering it without wiping the Mac.
A shared Mac does not need to be expensive
Fast User Switching turns one Mac into a machine the whole household or a small team can use. That makes an affordable desktop the smart buy for a shared spot: a refurbished Mac Mini (M2) starts at $897.99 and drives whatever monitor and keyboard you already own, and a MacBook Air (M1) from $569.99 works great as a shared laptop. Browse current deals on our Apple clearance page, every Mac is inspected, cleaned, and covered by our own one-year warranty.
Frequently asked questions
How many accounts can be logged in at once? There is no hard limit set by Apple, but each active session uses memory and CPU. On an 8GB Mac, two or three light sessions are fine; heavy apps in several accounts at once will slow things down.
Does Fast User Switching work on any Mac? Yes. It is a standard macOS feature on every MacBook, iMac, Mac Mini, and Mac Studio, back through many years of macOS versions.
Can other users see my files when I switch away? No. Each account’s home folder is private. Only files you place in /Users/Shared are visible to everyone.
Is it safe to leave my session running in the background? Yes, and it is convenient, your apps and documents stay open. If you want privacy, choose Login Window from the switcher so your screen is locked while you are away.