Hi. I’m finding it impossible to update/restore my late dad’s iPad Air 2 - I’m using finder on a 2015 big sur iMac - and while the first attempt gave me a progress bar, on resetting the process following the iPad’s inevitable 15-minute cut-out, I now get the window telling me that my Mac is downloading the software for the iPad - but the progress bar is just slow-moving diagonal chevrons, and I just *know* nothing is happening. Repeat ad infinitum… How can I get beyond this point??