How much storage is needed for this (11.5.1) upgrade? I have 23G and yet the download crashes

I am at 11.4 now. Typically in the past, the download/upgrade didn't work because of not enough storage, and Apple has been horrible about clarifying up front how much storage one needs...


MacBook Air 13″, macOS 11.4

Posted on Aug 9, 2021 9:31 AM

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6 replies

Aug 9, 2021 10:30 AM in response to DrMLaw

The files that you have control over are located in the Documents, Downloads, Pictures, Music and Movies folders.  You can use either of these two free apps, GrandPerspective  or OmniDiscSweeper, to find the largest files on your drive so you can determine if they can be deleted or moved to an external HD for storage.  


Note: you can empty the Downloads folder after the apps and/or updates that were downloaded have been installed or applied.  Many users have found a couple of Gigabytes of files in their Downloads folder which are no longer needed. 


Aug 9, 2021 12:24 PM in response to Owl-53

Thanks. I vaguely recall someone else in the past saying "15% of your total storage." I'd think that Apple could at least say that up front, rather than making people experiment and go searching for answers. I think the last time I needed about 18G-22G. Much appreciated. I'll keep that "formula" in mind for the future.

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How much storage is needed for this (11.5.1) upgrade? I have 23G and yet the download crashes

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