In Mojave (what i use regularly), i get an immediate generic error that i cant transfer because it might be an unrecognized file type. (They're MOV). When i use Catalina-Montery, the phone keeps connecting and disconnnecting every few seconds. Quickly pressing trust this computer doesnt help. The new software to support the IOS prompts for download and installs but that doesnt help. Using a USB cable. No video settings have changed. HDR off. iPhone 12 Pro. Any help would be appreciated.