Quick-fire questions
Can I use FileVault on a bootable external drive?
> Yes, enable it in System
Settings > Privacy & Security when started up from that drive. However, it works differently from
FileVault on internal storage, where it’s implemented in hardware in Macs with T2 or Apple silicon chips, and turns on and off instantly. External drive encryption is performed in software and takes time to complete.
Which Windows file systems are supported by macOS?
> Current versions of macOS can both read and write to old MS-DOS formats such as FAT16 and FAT32, which aren’t recommended now, and exFAT, which remains the standard for larger SDXC cards and is the most popular for USB flash drives. It can also read but not write NTFS.
How can an app be damaged after I updated it?
> Some updaters don’t work properly, and cause macOS to consider their signature is broken when checked. Delete the app, then download and install a new version.
How to stop TextEdit opening all my RTF files?
> Choose the app you want to open Rich Text files. Pick that from the list when you select a file; open Get Info (Cmd+I) then, to set it as the default from the ‘Open with:’ menu, click on Change All.