Updating to Big Sur from Catalina
Hi there, I am trying to update my iMac (2017 27inch) computer from Catalina OS to Big Sur. The Software update is stuck and won't show update. Update is also not shown in App store and when I manually try to download from App Store it also gets stuck ‘Finding Update’’. Can you advise on how I can update my OS please? Thanks
iMac 27″ 5K, macOS 10.15