Macworld
How to set up a guest account and guest sharing in macOS
Apple lets account-free users have access in macOS—with your permission.
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It's been hard to extend hospitality since early 2020, but Apple still lets macOS offer your guests plenty of privileges. In macOS, there are two ways for people without user accounts to make use of your Mac, so long as you give them permission.
Guest account
The guest account in macOS is a great way to hand over your computer to someone without giving them any access whatsoever to any of your files, passwords, or other information.