Tests bring some surprises, with encrypted sparse bundles looking resilient to small amounts of corruption.
Zip
A future version of macOS (?10.16) will check code signatures more thoroughly than at present. Here’s what to do to start preparing for that.
Which compression utility do you recommend?
When I tried to compress a folder in the Finder, nothing happened. How should I do this?
No matter how much disk storage you have, it just seems to fill up. Compressing little-used and archived items might be a good way to save space. Does it?