Classic Mac OS could give the size of data and resource forks. High Sierra ignored extended attributes, and Sonoma tries to add them, but only includes some.
Finder
Union mounts let you merge the contents of two volumes without copying any files. Do they work as expected in Sonoma’s APFS, though?
Details of the chain of information, from the UTI of the file to be opened, through LaunchServices’ database of document types. How to deal with problems.
Sparse bundle passwords, shared folders in macOS VMs, and security updates for VMs, are all important fixes. But none for the Finder.
Why did that progress dialog suddenly vanish long before it had even reached 50% of the copying progress?
Knowing a little about sparse and clone files in APFS is dangerous, as it can lead you to draw the wrong conclusions.
When did you last see figures on your Mac that were unbelievable, like 60 TB of snapshots on a 2 TB SSD? We need more sanity checking.
It turns out that the Finder is just retaining all those image thumbnails in its memory for 2-3 days after you last browsed them. Is this what we want?
Two memory leaks in the Finder, inability to change password for encrypted sparse bundles, and a crashing bug in Contacts. Detailed and reported to Apple.
How to get an app to leak memory, what a leak does, how to mitigate against a leak, and how an engineer should fix it.
The Eclectic Light Company 