Quick-fire questions

How to make a copy of my APFS backup storage?

> Copying old Time Machine backups was slow but possible. And as backups to APFS are saved in snapshots, and there’s no way to copy those, you can’t copy your backup volume. But backups made over a network to sparse bundles can be copied, and RAID systems can mirror backups too.

Why did High Sierra suddenly get Apple updates?

> Although it’s been over a year since the last security update for High Sierra, Apple still updates for XProtect and MRT to combat malware, and to ProVideo formats, MXF Plugins, and other support files. These are listed in the Installations item, under Software, in System Information, for you to check.

How to remove AppleMobile Device.kext from my Mac?

> You really don’t want to do that, as it’s one of Apple’s system kernel extensions. Although almost all system kernel extensions are stored in /System/Library/ Extensions, on the System volume, a few, including that one, are kept in /Library/ Extensions so they can be updated without requiring a full macOS update. Besides, that kernel extension is protected by SIP, so it wouldn’t be easy to remove anyway.

How to restore files from the Bin correctly?

> The Finder keeps a temporary list of their original locations, which supports the Put Back command in the contextual menu opened by ≈-clicking on the file in the Bin. That capacity is limited, though: put hundreds of files in the Bin, and you’re unlikely to put many back using the command. That information isn’t attached to the file, though. If you need to replace them manually, locate the correct place for each file by searching for it in a recent backup.