I have a 21.5 inch iMac that is part of the Beta program but I have yet to receive the Mac OS Big Sur Beta Download. Each time I attempt to do so, I receive a message that the version is not available and a warning that a Time Machine backup can not be found- even though it successfully backs up every hour. I am currently working on MacOC Catalina 10.15.7
Any Suggestions?
Any Suggestions?