Backup iPhone to Mac
I'm trying to backup my iPhone to my Mac (Catalina OS), but when I connect the iPhone to the Mac using the USB cable, it does not appear in the Finder window. What am I doing wrong?
iMac, OS X 10.11
If you check the diagram in step 5 just above “learn more” here, note you can automatically back up the iPhone whenever it’s connected to your Mac.
How to back up your iPhone, iPad, and iPod touch - Apple Support