Provided in Archive Utility and three command tools, its LZFSE compression even supports APFS special files like clones and sparse files.
encryption
On T2 and M1 Macs, FileVault provides robust protection of the Data volume on internal storage without any performance penalty.
Maybe you’ve just forgotten the password, or perhaps the owner/user of the Mac is no longer able to enter it. How to restore access to different models.
What is FileVault encryption? Is it the same as that on an M1 Mac’s internal SSD, or something different? How can you use it instead of overwriting an SSD? Which boot volumes are encrypted?
Securing sensitive data from access by others, and safeguarding it from loss of damage, is common. Solutions range from encrypted images to specialist external disks.
APFS adds 6 volume roles, including one which supports Time Machine backups. And per-file encryption is coming.
Spundle 1.1 adds creation of encrypted sparse bundles, changing their band size, and more.
Tests bring some surprises, with encrypted sparse bundles looking resilient to small amounts of corruption.
What to do, when you can, before taking or sending your Mac in for service or repair. What about FileVault? And Activation Lock?
What if you don’t want whole disk encryption? If your Mac doesn’t have T2, or if you’re using an external drive, encryption is still performed in software. Here’s a good solution.
The Eclectic Light Company 