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Chrisjames105

macrumors newbie
Original poster
Sep 12, 2021
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Chrisjames105

macrumors newbie
Original poster
Sep 12, 2021
28
4
OK, you'll have to make an USB installer of Mojave (on PC or Mac).
Again thanks for your patience. I have located a Mojave installer file and it’s downloading on my pc. When it’s done do I just transfer the .dmg file over to my usb flash and that’s it?
 
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KeesMacPro

macrumors 65816
Nov 7, 2019
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You're very welcome!
I understand it's not so easy, sorry about that ; )

I would not just transfer the dmg to USB, but use an app for it.
AFAIK Transmac works .
I'm afraid you'll have to google a bit and search for tutorials about how to make a bootable installer for Mac on PC.

The MBP 2012 is a very nice machine, the effort is worth it, dont give up!
 

Chrisjames105

macrumors newbie
Original poster
Sep 12, 2021
28
4
You're very welcome!
I understand it's not so easy, sorry about that ; )

I would not just transfer the dmg to USB, but use an app for it.
AFAIK Transmac works .
I'm afraid you'll have to google a bit and search for tutorials about how to make a bootable installer for Mac on PC.

The MBP 2012 is a very nice machine, the effort is worth it, dont give up!
Okay I have downloaded a dmg editor and I’m just waiting for the .dmg Mojave file to download. It looks like it’s going to be a while. I will update ASAP. I’m def going to need instructions on what to do.
 

KeesMacPro

macrumors 65816
Nov 7, 2019
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Okay I have downloaded a dmg editor and I’m just waiting for the .dmg Mojave file to download. It looks like it’s going to be a while. I will update ASAP. I’m def going to need instructions on what to do.
The dmg file should be about 6 GB .
 

KeesMacPro

macrumors 65816
Nov 7, 2019
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okay I’ve got the .dmg file onto the usb using transmac. Now what?
I'd plug it in the MBP ,startup and keep the option key pressed , choose the USB and see what happens : )
Once booted, you may have to format the internal drive to APFS in Disk Utility before running the installer.
 

Chrisjames105

macrumors newbie
Original poster
Sep 12, 2021
28
4
I'd plug it in the MBP ,startup and keep the option key pressed , choose the USB and see what happens : )
Once booted, you may have to format the internal drive to APFS in Disk Utility before running the installer.
But there’s still no APFS option…
 

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Chrisjames105

macrumors newbie
Original poster
Sep 12, 2021
28
4
Are you sure you booted from the USB and not in recovery mode?
I was in recovery mode. I tried booting from usb but this happened … I held option. For the sake of the video I didn’t choose my wifi but I did that originally and then clicked the Mac OS X from usb and same thing happened.

 

KeesMacPro

macrumors 65816
Nov 7, 2019
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I was in recovery mode. I tried booting from usb but this happened … I held option. For the sake of the video I didn’t choose my wifi but I did that originally and then clicked the Mac OS X from usb and same thing happened.
The USB installer is not recognized , sometimes the USB stick itself is the culprit.
I'd try another USB stick or external drive and make a new installer.
 

Chrisjames105

macrumors newbie
Original poster
Sep 12, 2021
28
4
The USB installer is not recognized , sometimes the USB stick itself is the culprit.
I'd try another USB stick or external drive and make a new installer.
It’s all good I think I’m throwing in the towel. This should have worked. Thanks for your help.
 

Fishrrman

macrumors Penryn
Feb 20, 2009
29,248
13,321
OP:

Your posts in this thread are "all over the place" -- flopping around like a fish out of water.

I also sense that perhaps you are learning why one should never never NEVER erase a Mac's internal drive unless one has an EXTERNAL backup of some sort -- preferably a bootable cloned backup created with either CarbonCopyCloner or SuperDuper. One ALWAYS must retain a way to "boot to the finder" in an emergency.

Referring to your post 29 above:

IF you are going to install
Mountain Lion (10.10)
El Capitan (10.11)
Low Sierra (10.12)
or High Sierra (10.13)

Then you want "Mac OS extended with journaling enabled, GUID partition format".

IF you are going to install
Mojave or later (Catalina, Big Sur, Monterey)

Then you want "APFS, GUID partition format".

When using disk utility YOU MUST BE CAREFUL to check the upper left for the option to "Show ALL devices".
You CANNOT ERASE THE ENTIRE INTERNAL DRIVE UNLESS you have gone to the View Menu and chosen "show ALL devices".

BE AWARE that older versions of disk utility don't have this option.
But if the option "is there to choose", then you MUST choose it.

Next, you "look over to the left" and choose the TOPMOST line that represents the PHYSICAL DRIVE inside the Mac.

Note:
If disk utility doesn't offer you the option to format to APFS, that's because you're using a version of disk utility that is TOO OLD, because you're trying to install an older version of the OS and disk utility will only format to the disk formats that it "understands".

Let's get something straight:
Have you tried just booting to internet recovery
Command-OPTION-R
... and then accepting whatever version of the OS it offers to you?

You will need to erase the internal drive first.
See the first part of my reply above.
 
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Chrisjames105

macrumors newbie
Original poster
Sep 12, 2021
28
4
OP:

Your posts in this thread are "all over the place" -- flopping around like a fish out of water.

I also sense that perhaps you are learning why one should never never NEVER erase a Mac's internal drive unless one has an EXTERNAL backup of some sort -- preferably a bootable cloned backup created with either CarbonCopyCloner or SuperDuper. One ALWAYS must retain a way to "boot to the finder" in an emergency.

Referring to your post 29 above:

IF you are going to install
Mountain Lion (10.10)
El Capitan (10.11)
Low Sierra (10.12)
or High Sierra (10.13)

Then you want "Mac OS extended with journaling enabled, GUID partition format".

IF you are going to install
Mojave or later (Catalina, Big Sur, Monterey)

Then you want "APFS, GUID partition format".

When using disk utility YOU MUST BE CAREFUL to check the upper left for the option to "Show ALL devices".
You CANNOT ERASE THE ENTIRE INTERNAL DRIVE UNLESS you have gone to the View Menu and chosen "show ALL devices".

BE AWARE that older versions of disk utility don't have this option.
But if the option "is there to choose", then you MUST choose it.

Next, you "look over to the left" and choose the TOPMOST line that represents the PHYSICAL DRIVE inside the Mac.

Note:
If disk utility doesn't offer you the option to format to APFS, that's because you're using a version of disk utility that is TOO OLD, because you're trying to install an older version of the OS and disk utility will only format to the disk formats that it "understands".

Let's get something straight:
Have you tried just booting to internet recovery
Command-OPTION-R
... and then accepting whatever version of the OS it offers to you?

You will need to erase the internal drive first.
See the first part of my reply above.
Yes I am very new to MacBooks and I def blame myself for not having a backup.

My disk utility does not have the “show all devices” option. I saw that in some of the videos I watched and I def don’t have that. I have an older version of disk utility like you said.

I did try erasing and formatting the drive to Mac OS extended (journaling) and in turn it offered up mountain lion as the OS to install. I’m assuming it must have come with mountain lion. I don’t remember.

BUT when I did that, this occurred… (see image)
 

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KeesMacPro

macrumors 65816
Nov 7, 2019
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Without another Mac device the scenario is complicated.
If you know somebody with a Mac you could ask him/her to make a bootable USB.
Standard procedure (for me) is to test an installer before erasing anything.
Making a Mac OS installer on a PC is hit or miss ...
Last resort could be to buy a readily made installer on e.g. eBay or a computer repair shop (for a small price).

The MBP 2012 is a nice device and IMO worth it...
 

Chrisjames105

macrumors newbie
Original poster
Sep 12, 2021
28
4
Hey everyone! So my friend and I were able to get my MacBook running on mountain lion. It seemed to be running great again until the next day when it started loading super slow again. Even when I finally get onto my desktop screen, you can’t load anything. Is this MacBook just completely done for?

**I bought this off of Mac of all trades and this is what it has:

MacBook Pro 13-inch (Glossy) 2.5GHz Core i5 (Mid 2012) MD101LL/A 5​

16GB memory
480 GB ssd
 
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