Can I delete the Application Support folder?
Application Support holds the settings and data of your apps. Remove a folder only after identifying all its consumers and checking that its retained data is unwanted or safely exported/backed up.
Guides to freeing up space on your Mac
What’s safe to remove, what isn’t, and how macOS storage works.
Articles, page 11
Can I delete /private/var/folders?
/private/var/folders holds temporary files for macOS and your running apps. Here is why to leave it alone and what to do if it looks large.
Mac keeps running out of space for no reason: 8 usual suspects
A disk that keeps refilling usually has a steady source: backups, downloads, caches, snapshots or a growing app. Here are eight to check.
macOS Tahoe System Data huge or stuck on 'Calculating'
A big System Data number or an endless 'Calculating' after a Tahoe update is common. Here is a calm checklist: wait, restart, check snapshots and caches, and leave system folders alone.
Do Mac cleaners work? An honest answer from people who build one
Some of what cleaners do is real and useful. Some of it you can do yourself in a few minutes. Here is how to tell the difference.
Android Studio taking up too much space: SDK, emulators and AVDs
Android development spreads across several folders. Here is what each holds, how big it gets, and what removal costs.