Finder wants update to connect iPhone, both are current
I have an iPhone7+ running iOS 14.7.1 and a iMac running Catalina 10.15.7 which is the newest that it can update to.
I backup my iPhone to iCloud. Occasionally as a second source, I back it up to my computer. Today I plugged in my phone for the backup, and it says 'A software update is required to connect to your iPhone'?
Both are up to date.
iPhone 7 Plus, iOS 14