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Released October 24, 2011 / 2.2, 2.4, or 2.5 GHz Quad-core Intel Core i7 Processor

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Hard Drive failed, can't reinstall on external drive

I have this late 2011 MacBook Pro (15”) that has been sitting around for a year or two now because it was so slow. I erased it and reinstalled Mac OS and sent it off as trade in. They returned it to me and said it wont start. Since it started for me I had it returned to me and I figured maybe I’ll try to upgrade the RAM and salvage it.

It starts for me but now after having it shipped back and forth, disk utility says the hard drive has failed beyond repair. So I thought maybe I can reinstall on an external drive to see if it even recognizes the RAM before I replace the hard drive. Starting in recovery mode it lets me choose “Reinstall Mac OS” (wanting to install Lion) and choose the external (reformatted) drive, but then it stops and says it is not able to download additional components for the installation.

Would there be any sense in replacing the hard drive and trying again?

Or installing OS X on an external drive from a different computer?

Or is this all beyond repair?

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You’ve got a few problems here ;-{

The first is the drive you have connected externally format may not be compatible with OS-X’s need. Go back into OS recovery and this time go the menu to select Disk Utility and reformat your external drive to GUID Journaled.

But we still have a problem! Apple’s certificates on the older OS’s have not be updated! This is where the recovery partition or Internet recovery will fail. So you’ll need to fool the OS installer by back dating your system manually to the OS installer doesn’t know the true date! I would just go with a newer version that has the correct certificate I would go with Sierra as being the best for your system.

Create an OS installer following this guide How to create a bootable macOS Sierra installer drive You’ll want this image How to upgrade to macOS Sierra jump down to Step 4 to get the link. The reason you want this file is the older ones have an expired certificate too! Here’s a bit more If you've got an old macOS install image, it will probably stop working today

Hopefully you can get the external drive going so you can at least validate the system is OK.

Getting an SSD for this system is not a bad thing! I would just go with a smaller one 256 or 500 GB and upgrade it to at least 8GB of RAM to make is usable.

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Thank you! I had come across the MacWorld articles before, but where i got stuck was in downloading High Sierra. The Mac's we have both run Mojave and all it will offer me is to upgrade to Catalina. Is there any other options for getting the installer on my external harddrive?

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I don't recommend High Sierra on the older SATA based systems as the new APFS file system does not play well on these older drives.

But it you must... Here's the image for it How to upgrade to macOS High Sierra Again jump down to Step 4 to get to the image file. And here is the steps to make a High Sierra OS installer How to create a bootable macOS High Sierra installer drive

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Oh sorry, i totally missed that link with the download, now i got the sierra installer and will give that a shot. thank you!

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OK,

So I downloaded on a 2012 Mac mini and all the ways the above article mentions to create a bootable drive result in an error message.

I've tried various hard drives, just got a brand new thumbdrive as well and all get the same errors (can't be unmounted, i believe).

When i try erase them again it never gives me that third option of GUID, just "journaled", no matter if I use an older or a brand new computer to do it. But I did check one of the drives and in the information about it it does say GUID. Any ideas what could be going on?

Terminal says: "Untitled is not a valid volume mount point" (Untitled being the name of the thumb drive)

Oh and I'm not able to download the Sierra installer on my new MacBook Pro (2019) at all.

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Why are you jumping between the 2012 Mac Mini and now the 2019 MacBook Pro?

Your MacBook Pro won't run Sierra which is why it won't work. You really need to stick with the Mac mini to do this.

As far as GUID If you pick 'Journaled' for the format with the older Disk Utility you'll be using GUID/Journaled.

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