Trim enables an SSD to erase pages of unused memory so they’re ready for reuse. It saves time, and greatly improves write performance. How to the best out of Trim.
APFS
Study how the four key timestamps of a file change when you create, edit, preview the file, using Dropera.
Two confounding factors to take into account when interpreting timestamps on files: what updates the Last opened time, and access via QuickLook.
First Aid in Disk Utility, or fsck_apfs in Terminal, have given warnings or errors with id numbers. How do you work out which file or folder that refers to?
First Aid in Disk Utility, or running fsck_apfs in Terminal, return warnings or errors on one of your Mac’s volumes. Here’s what to do next.
How APFS is the first Mac native file system to have true inodes and inode numbers. What they are, and how you can use them in volume groups and different types of file link.
When the numbers simply don’t add up. How some extended attributes may be included in quoted file sizes, but others are ignored, and Sequoia hasn’t really changed this since Classic Mac OS of 25 years ago.
What do you do when you discover your Mac’s Data volume has run out of free space? A guide to working with snapshots, iCloud Drive, and other tricks to salvage your Mac. And how to prevent this from happening again.
How can you assure yourself that important files retain their data intact? Here’s a simple strategy for doing that, which works better on a file system that doesn’t check integrity.
Does software encryption (APFS Encrypted) result in significant overhead when using faster SSDs with a faster Apple silicon Mac? What about computing SHA256 digests?
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