alt Hacker NewsThe system data issue on macOS is awful.
I use my MacBook for a mix of dev work and music production and between docker, music libraries, update caches and the like it’s not weird for me to have to go for a fresh install once every year or two.
Once that gets filled up, it’s pretty much impossible to understand where the giant block of memory is.
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Because Apple differentiates their products by their storage sizes, they also sell iCloud subscription. There is zero (in fact negative) incentive to respect your storage space.
I had the same problem and had some luck cleaning things up by enabling "calculate all sizes" in Finder, which will show you the total directory size, and makes it a bit easier to look for where the big stuff is hiding. You'll also want to make sure to look through hidden directories like ~/Library; I found a bunch of Docker-related stuff in there which turned out to be where a lot of my disk space went.
You can enable "calculate all sizes" in Finder with Cmd+J. I think it only works in list view however.
The trick is to reboot into recovery partition, disable SIP, then run OmniDiskSweeper as root (as in `sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper`). Then you can find all kinds of caches that are otherwise hidden by SIP.
Seconding.
I should not have to hack through /Libary files to regain data on a TB drive because Osx wanted to put 200gbs of crap there in an opaque manner and not give the user ANY direct way to regain their space.
Even worse on ipad. My wife is an artist and 100gigs of "system data" is completely inscrutable and there's zero ways to fix it besides a full wipe.
I simply run GrandPerspective (GUI app, https://grandperspectiv.sourceforge.net/), or dust (terminal app, https://github.com/bootandy/dust), to give me an idea of what is going on with disk usage.
Equally egregious are applications that insist on using the primary disk to cache model data/sample data/whatever
My 256gb Mac Mini currently has 65gb of "System Data" and 40gb of "MacOS"
Gotta hit that docker system prune -a
> Once that gets filled up, it’s pretty much impossible to understand where the giant block of memory is.
Your friend is called ncdu and can be used as follows:
sudo ncdu -x -e --exclude Volumes /System/Volumes/Data/
Yep, it is an awful situation. I'm increasingly becoming frustrated with how Apple keeps disrespecting users.
I downloaded several MacOS installers, not for the MacBook I use, but intending to use them to create a partitioned USB installer (they were for macOS versions that I could clearly not even use for my current MacBook). Then, after creating the USB, since I was short of space, I deleted the installers, including from the trash.
Weirdly, I did not reclaim any space; I wondered why. After scratching my head for a while, I asked an LLM, which directed me to check the system snapshots. I had previously disabled time machine backup and snapshots, and yet I saw these huge system snapshots containing the files I had deleted, and kicker was, there was no way to delete them!
Again I scratched my head for a while for a solution other than wiping the MacBook and re-installing MacOS, and then I had the idea to just restart. Lo and behold, the snapshots were gone after restarting. I was relieved, but also pretty pissed off at Apple.