I have a Mac Pro with macOS Catalina 10.15.7. I received the update to BigSur requiring 12GB but as soon as I downloaded it, in order to do the update it requires another 34GB free on 121 I have on my disk... is it right?

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I have a Mac Pro with macOS Catalina 10.15.7. I received the update to BigSur requiring 12GB but as soon as I downloaded it, in order to do the update it requires another 34GB free on 121 I have on my disk... is it right?

I have a Mac Pro with macOS Catalina 10.15.7. I was updating to BigSur (12GB download) and after this, to start the installation process, the system requires another 35GB free. My disk is 120GB, before the download I had about 40GB free...So is this installation really going to use all my disk space?

Thank you

MacBook, macOS 10.12

Posted on Dec 18, 2020 3:04 AM

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dialabrain

Level 10

125,693 points

Dec 18, 2020 3:16 AM in response to 9A9A

"If upgrading from macOS Sierra or later, macOS Big Sur requires 35.5GB of available storage to upgrade. If upgrading from an earlier release, macOS Big Sur requires up to 44.5GB of available storage."

From: How to upgrade to macOS Big Sur - Apple Support

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I have a Mac Pro with macOS Catalina 10.15.7. I received the update to BigSur requiring 12GB but as soon as I downloaded it, in order to do the update it requires another 34GB free on 121 I have on my disk... is it right?

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