"Your system has run out of application memory" caution on my MacBook Air


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MacBook Air, macOS 15.3

Posted on Jan 31, 2025 8:58 PM

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8 replies

Feb 1, 2025 8:13 PM in response to harshxsr

harshxsr wrote:

My MacBook air M2 only has 8 GB.
I have no idea how it gets upto 45GB and that too while streaming


macOS on your MacBook has 64-bit virtual addressing, which is massively more than 8 GB physical addressing.


With virtual addressing, macOS uses main storage to extend the available main memory.


(No apps will need anywhere near 64 bits of virtual memory anytime soon, but lots of apps need far more virtual memory than previous designs offering 32 bits of virtual memory addressing.)


Apps and data get shuffled into main memory from main storage, and back to main storage from main memory, depending on which parts of the apps and data and macOS are active and busy, and which are not; are idle.


The issue here is that the aggregate of macOS and all of the apps running — particularly that Disney app — is using so much virtual memory that macOS can’t fit it all into the aggregate of the 8 GB main memory and spilling the rest into the available main storage.


The error results.


Report this issue to the app developer.

Feb 1, 2025 9:12 PM in response to harshxsr

"’Your system has run out of application memory’ caution on my MacBook Air

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"Your system has run out of application memory" caution on my MacBook Air

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