Can I download the Big Sur on a MacBook Air with 10.10.5?

If you have one of these Macs…

MacBook introduced in 2015 or later

MacBook Air introduced in 2013 or later

MacBook Pro introduced in late 2013 or later

Mac mini introduced in 2014 or later

iMac introduced in 2014 or later

iMac Pro

Mac Pro introduced in 2013 or later

As @Dialabrain outlines for computer qualifying for the Big Sur upGrade. Additional reading Before attempting https://discussions.apple.com/docs/DOC-250003367

See…

SPSS Statistics on macOS Big Sur

Please refer to the community post SPSS Statistics on macOS Big Sur (11.0) for more information.

Do not download Big Sur unless you had a Time Machine Backup