MacBook Air M2 System Data suddenly large

My mac system data has become very large all of a sudden.

I usually have approximately ~150 GB free on my 512 GB MacBook Air M2, but suddenly free space has shrunk to 1 GB - I haven't used my mac for a day, so it's definitely not because I've got some new big files to clog it up. I've emptied my trash and some unnecessary files - got 30 GB free, but it's still a problem cause I haven't downloaded any big files to clog up the storage that much. I looked at the system data panel and it showed 213 GB, that's way too many.

What should I do? What may be the cause of the problem?


P.S. It's unavailable in my country to pay for CleanMyMac app, so please don't suggest it to clean up the storage :(

MacBook Air 15″, macOS 14.8

Posted on Jan 19, 2026 6:10 AM

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2 replies

Jan 19, 2026 7:34 AM in response to plaingermanica

plaingermanica wrote:

My mac system data has become very large all of a sudden.
I usually have approximately ~150 GB free on my 512 GB MacBook Air M2, but suddenly free space has shrunk to 1 GB - I haven't used my mac for a day, so it's definitely not because I've got some new big files to clog it up. I've emptied my trash and some unnecessary files - got 30 GB free, but it's still a problem cause I haven't downloaded any big files to clog up the storage that much. I looked at the system data panel and it showed 213 GB, that's way too many.
What should I do? What may be the cause of the problem?

P.S. It's unavailable in my country to pay for CleanMyMac app, so please don't suggest it to clean up the storage :(

Veteran users will never advise that you buy, install or use CleanMyMac. To many here in the community is is akin to malware and often referred to as 'BrickMyMac'.


Good to know you got this sorted out.

Thank you for sharing with the Community, my friend. 🙏🏽

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MacBook Air M2 System Data suddenly large

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