Hi all, I have a late 2013 27” iMac with full memory bank. I teach Spanish and German and use my iMac to record and save lessons. I have just found out the hard way that my Mac is obsolete according to Apple and I can no longer use my iPhones to download my audio lessons. Much worse is that I can no longer back up or sync my phones. As a 77 year old pensioner Apple has denied me one of my few productive pleasures. I am furious. I have been speaking to an Apple adviser who has promised to ring me back butI am not hopeful as the last adviser gave me six hours work reinstalling Catalina and many other files to no avail. Question, can I get a late 2013 upgraded by Apple to make it compatible? I really should not have to do this. My first Apple was in 1986 for work, hence my severe disappointment. Help