When you upgrade to macOS 10.15 Catalina, your boot volume will effectively be split into two. Assuming it’s the standard internal storage, your existing boot volume will be renamed to Macint…
Single-user mode to run fsck to check and repair your boot disk became tricky with Fusion Drives. With a T2 chip, it’s not practical in its traditional form.
Catalina will change our boot disks substantially with its read-only system volume. Here’s an account of what we already have in Mojave.
What’s the minimum size of a container, or a volume, in APFS? The answer can range from 1.05 MB up to 167.8 MB, it appears.
It may be over 2 years old, but its supporting tools are more like those of a beta. Adding containers isn’t at all straightforward.
Should you enable TRIM, and what is it? Do you need to turn wear levelling on, and what about fragmentation on SSDs? Some mysteries explained.