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Just bought a Imac 27 inch from Apple but
- Thread starter shaee
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Catalina is what the 2020 27” iMacs originally came with. Should be fine. I suggest upgrade to big sur only. Trust me, you don’t want Monterey yet, not until they have fixed the major bugs
I know I have a 2020 for myself but I thought at least it would have been Big Sur. There isn't an option to pick Big Sur as an upgrade only Monterey. Monterey is a little buggy, memory leak but faster than Catalina.
This might help
How to download and install macOS - Apple Support
Download and install current or previous versions of the Mac operating system on compatible Mac computers.
otherwise wait until 12.1
thanks but my question was what OS is the 2020 iMac 27 inch being shipped with currently.This might help
How to download and install macOS - Apple Support
Download and install current or previous versions of the Mac operating system on compatible Mac computers.support.apple.com
otherwise wait until 12.1
Probably Catalina since you purchased yours last week (Nov 27) and that's what it came with.
I guess you need someone to respond who got one in the last month.
May depend on whether you custom ordered or not.
According to this post, a custom order was shipped with Big Sur 5 months ago:
My 24” M1 iMac which showed up at my doorstep in July came with Big Sur. I have been holding off upgrading to Monterey until the 12.1 update drops.
It's probably been sitting around in stock for a while as you would have to be crazy to pay full price for one now with a major refresh coming next year.
Just clean install with your macOS of choice and move on.
