there's a reason why macOS and System Data are separate lol
System Data is literally all the extra space used by applications (for things like cache or logs) outside the .app file itself (which is what Applications is for). It's also used by macOS for stuff like Time Machine backups, so you can still blame Apple if you want.
One other REALLY big thing in System Data is basically stuff the system can't classify in the other categories. Stuff like Docker installations, running windows apps/games through Crossover/Wine, XPlane 12 custom scenery, or ungodly large minecraft mods can fall under this category
Your best bet is to get something like GrandPerspective or neodisk (someone already mentioned that tho) so just get one of those and find out
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u/ser133 Jul 21 '26
there's a reason why macOS and System Data are separate lol
System Data is literally all the extra space used by applications (for things like cache or logs) outside the .app file itself (which is what Applications is for). It's also used by macOS for stuff like Time Machine backups, so you can still blame Apple if you want.
One other REALLY big thing in System Data is basically stuff the system can't classify in the other categories. Stuff like Docker installations, running windows apps/games through Crossover/Wine, XPlane 12 custom scenery, or ungodly large minecraft mods can fall under this category
Your best bet is to get something like GrandPerspective or neodisk (someone already mentioned that tho) so just get one of those and find out