9/25/2019 Mac Os Sierra For 2012 Macbook Pro
Allan Jones wrote: I add my vote of confidence. I have a mid-2012 13-inch non-Retina MBP with the entry-level 2.5 ghz i5 processor and 8GB RAM.
Oct 31, 2018 Macbook Pro mid-2012 mavericks to sierra. Discussion in 'MacBook Pro' started by STC1709, Jun 12, 2017. I'm running Mavericks on my 2010 Macbook Pro and that's the latest OS I will use for that machine. As someone else said, if it's not broke, don' fix it. Somebody in the Mac Mini forum just put Sierra on their 2011 Mini and has found.
I upgraded to High Sierra 10.13 while the computer still had its slow 500GB rotational drive. The computer ran exactly the same speed as it did with Sierra 10.12. Then I upgraded to a 500GB SATA 6Gbps SSD and this little computer runs like something new. Everything happens fast now. I just got an SSD and I'm a believer now.
I remember someone posting here stating that an SSD may mask problems, I suppose by blowing right past the problems with brute force. At this point I'm all for brute force.
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I had this same exact problem on my mid 2012 with a HDD. I tried everything, but I could not get past the installation error screen. I called apple support and they told me my drive was corrupt. Didn't seem possible, because my laptop was working just fine (a bit slower after years of use, but still powering on and functioning as normal). I purchased a 120gb SSD to test if it was really my drive, or the OS, and it worked after swapping my HDD for the new drive.
I'm not too sure why it wouldn't install on my HDD, but after installing the new SSD, I used a SATA transfer cable and recovered some important files, and the drive connected just fine. I was updating from Sierra to High Sierra, and this was the first time I ever had this issue. I would say, maybe you should just buy a new SSD. Sucks, but it worked for me. Thanks for all the suggestions! Not sure what happened, but Apples Senior advisor said something about the partition being 'corrupted'. I bought an external hard drive and loaded the newOS onto the external.
From there I copied my user data from my SSD to my new updated desktop. Once that finished I back up to the time machine. I shut down and booted into recovery mode. I clicked on disk utility and erased my SSD.
From there I restored from my time machine. I chose the recent back up, and I made the destination my SSD. Now I'm in the process of restoring! Hope this helps someone in the future.
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