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The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
I'm considering getting a new MB Air 2020 which already comes with Catalina.
Currently I'm using a MB with Mojave with dozens of 32-bit apps, so I do need Mojave.
If I use Time Machine to migrate all data from my old MB with Mojave to the new MB Air, the OS will be downgraded automatically to Mojave?
Or should I use another method for downgrading?
I appreciate for any feedback from users that have tried it with the new MB Air 2020.
MacBook
BDST Said:
"New Macbook Air 2020 - how to downgrade to Mojave?: I'm considering getting a new MB Air 2020 which already comes with Catalina. Currently I'm using a MB with Mojave with dozens of 32-bit apps, so I do need Mojave. If I use Time Machine to migrate all data from my old MB with Mojave to the new MB Air, the OS will be downgraded automatically to Mojave? Or should I use another method for downgrading? I appreciate for any feedback from users that have tried it with the new MB Air 2020."
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On the 2020 Mac, You Cannot Downgrade:
Go Here: Use the Mac operating system that came with your Mac, or a compatible newer version. As it reads: "The version of macOS that came with your Mac is the earliest version compatible with that Mac."
As for Getting the Correct Software....
If your new MacBook Air comes with Catalina it will not be able to run Mojave. Macs can not run systems older than the one it came with. Since the 13" 2020 MacBook Air9,1 Retina comes with 10.15.3 installed it will not be able to run Mojave.
Don't get one unless you're willing to upgrade all 32 bit software to 64 or alternatives. Maybe you can find a refurbished 2019 MBA at Apple's refurbished site which can run Mojave. I wouldn't settle for less that the 16 GB RAM model. It can't be upgraded after purchase.
Note: just checked the refurbished page and there are no MBAs listed at this time.
You might be able to install Mojave inside of a Virtual Machine, but you would need to download the Mojave installer on another Mac. You can't download it on Catalina.
New Macbook Air 2020 - how to downgrade to Mojave?
