Can't select Back up iPhone to Mac
Back up iPhone using your Mac
Connect iPhone and your computer with a cable.
In the Finder sidebar on your Mac, select your iPhone.
To use the Finder to back up iPhone, macOS 10.15 or later is required. With earlier versions of macOS, use iTunes to back up iPhone.
At the top of the Finder window, click General.
Select “Back up all of the data on your iPhone to this Mac.”
I can't do the last step, it's gray.
Why and what do I do?
iMac