Unable To Edit - Shared Offline / Needs Upgrade?
I just tried to edit a shared spreadsheet and am unable to do so for some reason.
Numbers keeps pestering me to upgrade to v10.2 (currently at v10.1) but I can't do so because I'm not running MacOS v10.15 (only v10.14.6)
Why is this happening? It's possible that the person that I am sharing with already upgraded. But why can't I unshare?