Just upgraded my Macbook running macOS Big Sur from Office 2010 to Office 2021. Purchased from Amazon.


Installed ok, but hangs a lot and although I have activated it via Microsoft , it requests reactivation again and again every time I use one of the Apps. It is unusable at the moment. Very disappointed as it cost a lot of money. No access to any tech support at Microsoft as all appears to be online without any satisfactory solutions
My old 2010 version worked perfectly , but was no longer supported. how ironic!


Any advice appreciated.