I am using Macbook Pro Mid 2012 13" with 128GB SSD. The latest installed version of OS X was El Capitan which crashed during a Sierra upgrade.
Internet recovery mode worked somehow to land me to install download and install a new OS but it's Mountain Lion, which came installed when I bought the Macbook few years back However, it's rejecting to install on current SSD drive as shown in pic.
I have another 320GB HDD, so is this the only way to reinstall? First I do a fresh install of Lion on the external HDD? What I should I do?
What is a step by step procedure as all I want to do is run OSX on SSD drive but keeping all my older data. I can not afford to wipe it.
However, I did back up some of its backup onto my PC. If I install Lion the HDD can I then download Sierra and create an install disk to update/fix/install corrupted OS X on SSD?