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scifiman

macrumors member
Original poster
Can we talk about drive space for a minute?

In what universe is it ok for macOS (and "System Data") to consume 80GB out of a 250GB drive on an entry level M3 MacBook Air. I myself have been working in IT for 20+ years so I'm familiar with bloat, but it usually gets attention and there is an effort to reduce bloat by the offending company. That's what I'm hoping for from this post - that we can bring this issue to light and Apple will make an effort to reduce the bloat. Stock Win11 installs are usually around 30ish GB. Community projects have pushed Win11 Tiny (Tiny11) down to less than 10GB. I want that same treatment for macOS.

This Air happens to be primarily used for my kids. They do have some files, but we have full iCloud syncing turned on. Yet it is still out of space. I can go through and do some hard core cleanup and get maybe 20GB reclaimed, but looking at macOS, I have to wonder why it needs so much itself.

It looks like 10-15GB is used for Apple Intelligence so I have turned that off. The System Data partition includes log files, config files, apfs snapshots, other files that are "supposedly essential for macOS to operate." I understand that is the company line for why these files exist. If I could get into System data, I'm sure I could browse through it and see "oh yes, this is the executable for zsh" or "This runs the Dock", etc. I know there are essential files. But Apple needs to do a better job of reducing some of these files if they will not up the default storage of their entry level machines. The combination of small storage and bloat makes these have an extremely limited lifespan and could almost be a legal issue of planned/forceful obsolescence.
 
I'm on record in this forum for posting for some time now that 256gb is "no longer enouogh" as a base Mac SSD configuration.

512gb is what I'd call "the new minimum" these days.
And 24gb or more RAM.

Having said that...
Apple's OS is what it is.
It will probably require MORE drive space in the years to come.
You're not going to change this.
See above.

Re "snapshots"...
You don't need them.
I've never used time machine (and never will) -- I like cloned backups, using CarbonCopyCloner. Even CCC will create shapshots these days, unless you turn off that feature (which I have done).
You can delete existing snapshots using disk utility. That can clean up a good amount of space.

I'm wondering if the OS will "get slimmer" once Apple drops support for Intel-based Macs in a future OS release. We'll just have to wait and see about that...
 
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Re "snapshots"...
You don't need them.
I've never used time machine (and never will) -- I like cloned backups, using CarbonCopyCloner. Even CCC will create shapshots these days, unless you turn off that feature (which I have done).
You can delete existing snapshots using disk utility. That can clean up a good amount of space.

I'm wondering if the OS will "get slimmer" once Apple drops support for Intel-based Macs in a future OS release. We'll just have to wait and see about that...
You know, Universal Apps are something that I didn't consider before posting. But I bet you're right. As every binary is double in size to support both Intel and Arm, it should decrease once Intel support is fully eliminated.
 
System Data for me takes up about 35 GB, macOS 21 GB.

Surely you can then figure out what exactly is taking that space up, then take actions to reduce it?
Like I said in the post, I seem some necessary files, but I'm not the developer. All the files and executables are binary-encoded. I don't have access to the source code so no, I am not able to take actions to reduce it. That is also why I explicitly called out Tiny11 as a community driven project because I know there are people more knowledgeable than me on these things even with my experience.
 
Do you ever close applications or shut down or restart the Mac?

Make sure whether you restart or shutdown to not re-open windows.

512GB should be the minimum for iPhone, iPad, and Mac.
 
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There are so many threads on this forum about erroneous reporting of system data, but it's hard to find them with the forum's search. https://www.google.com/search?q="System Data" site:https://forums.macrumors.com/threads/&hl=en-US&gl=US
I used a constrained MR forum search.
keyword: system
scope: this forum (i.e. the one where this thread is located)
Search titles only: checked

Here's most of the salient results from the first 3 pages.
Unfortunately, they aren't in strict newer-to-older order, but I don't think any are older than 2022.












Another forum where this topic appears somewhat regularly is:

I did a similar search there and didn't get much. That makes me think that a suitable keyword isn't "system", and the titles might be more general. That is, they might be asking more generally about how to find and remove large or unnecessary files.

For example, this thread:
A typical search term for that kind of app is "cleaner". I just remember that thread recently, and had to scroll down to find it, because it didn't appear with the usual keywords.
 
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