Question marked as Best reply User profile for user: Niel Niel User level: Level 10 727,763 points Jan 17, 2022 10:45 AM in response to skydog80 Back up your data, check your applications for compatibility, and click on Big Sur.Catalina and newer won't run 32-bit software; download and use Go64 to scan for it. To check other programs, click here and look them up.(212265) Show more Less Reply Link