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I am installing Mac OS Catalina on Mac OS mid 2012 as upgrade install from Mac OS Yosemite It has stuck for about 3 hours now at finishing bar of macOS Catalina will be installed on disk Kindly guide what to do

screenshot of where installation is got stuck

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screenshot of laptop specifications

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I'd suggest patience proportional to the time since your last backup.
Catalina will reformat the drive into new partition types. Interrupting that is going to mean starting over.
If you're lucky, the time it's taking is simply the time needed to reformat. macOS since maybe High Sierra or Mojave really expects to be running on an SSD, so there's going to be considerable additional time penalty whilst it does this conversion on an HD.

If your backup is good, you could consider dumping this attempt & start over with El Capitan, which is considered minimum OS from which to jump to Catalina. I'm somewhat surprised the installer didn't prevent you from going ahead, though I've never attempted to jump this far myself, so I don't know how the installer should react to the attempt.

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  • thanks for your kind response, Now I am downloading El Capitan and then upgrade to Catalina Dec 27, 2020 at 10:28

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