After I changed my SSD I accidentally deleted my Time Machine back up while restoring my Mac Pro. I got nothing left in my external Hard drive. And I tried to reinstall Mac OS X but App store says its unavailable. Dont know what to do. How can I fix this somebody help ☹️
The unavailable message usually means that a used Apple ID doesn't match the one the App Store recognises. Have you access to another Mac you can make a USB installer from?
You aren't so lucky as to live somewhere close to an Apple Store, are you? I'm sure they could get an OS on it for free and without hassle. If not, and you can't get a hold of another Mac, the only solution I can think of is not a very good one - trying to find a download for an OS X/macOS installer on the internet. Since it's not from Apple I don't like that approach, but you could, if you can find one, make a bootable USB with it through Linux or Windows.
You can do a net install. It's cmd+option+r I think during boot up. I would recommend connecting the computer via Ethernet cable. If you want to make any attempt at data recovery on your hard drive you should do so BEFORE doing anything else.
Actually you were right about the unavailability of the OS because of the account. I forgot my Account password then Its on process for recovery so I just made a new account maybe thats why I cant install it. You think after I recover my password I can reinstall it?