Cannot restore iPad with recovery mode
I have a 1st generation iPad Pro that I want to factory reset. The iPad goes into recovery mode correctly but I'm unable to restore it.
I've tried it with two macBooks. The older macBook running Big Sur showed the Finder window with the Restore iPad button but clicking it had no effect. I tried putting the iPad into recovery mode multiple times and let it sit for a very long time. I tried reconnecting both ends of the cable and with a second Lightning cable.
The second macBook with the latest version of Ventura wouldn't recognize the iPad at all, it wasn't listed in the Finder window. I had to use a USB-C dongle with this one and I know the dongle is functioning correctly.
I've googled the issue and read all the suggestions offered on various sites but none seem to address this specific issue.
iPad Pro (1st generation)