How do I fix my MacBook Pro (Mid 2012) start up issue?

Question

How do I fix my MacBook Pro (Mid 2012) start up issue?

After successfully Boot-camping on another mac, I gave it a shot on my own mac.

I got as far as selecting where Windows was to be installed when I encountered a problem.

I went to return over to my mac side when the following occurred:

• My computer started with the "Your computer restarted because of a problem message".

• After waiting a few second the Apple Logo appeared with the loading bar beginning.

• This was shortly followed by lines of code saying error.

• The computer then restarted, beginning the whole process again.

This is an image of the screen before the computer shuts down.

I've tried launching a hardware test, the test yielded a "no problem" result.

I also tried launching by holding D and S.

I'd really appreciate some help over this.

Thanks,

- Hugh

MacBook Pro, OS X Yosemite (10.10.4), Mid-2012

Posted on Jul 1, 2015 12:23 PM

Reply

Answer 1

Loner T

Level 9

59,471 points

Jul 1, 2015 12:38 PM in response to Hugh Beaumont

Can you start in Safe Mode - Try safe mode if your Mac doesn't finish starting up - Apple Support ?

Reply

Answer 2

Jul 1, 2015 1:52 PM in response to Loner T

I tried starting in safe mode, but the mac fails to do so. I don't even hear the startup chime before the apple logo appears.

Reply

Answer 3

Loner T

Level 9

59,471 points

Jul 1, 2015 2:21 PM in response to Hugh Beaumont

1. Did you apply recent Firmware updates?

2. You can try and install OSX on an external disk - OS X: Installing OS X on an external volume - Apple Support - and check if it allows you to boot from it?

3. Was Windows installed using EFI Boot?

Reply

Answer 4

Jul 1, 2015 4:24 PM in response to Loner T

I can't get onto the Mac at all, it just keeps cycling in the way I originally described.

As far as I'm aware, I didn't apply recent Firmware updates.

Yes I used an EFI Boot, although I didn't actually complete the process, as after I formatted the Bootcamp partition, as is standard procedure in Boot-camping, the Setup wouldn't let me click next.

Reply

Answer 5

Loner T

Level 9

59,471 points

Jul 1, 2015 4:49 PM in response to Hugh Beaumont

1. Macs prior to Late 2013 Macs do not support EFI Boot very well. You have corrupted EFI Firmware.

2. Can you try Command+Opt+R - OS X: About OS X Recovery - Apple Support - Internet Recovery?

3. Do you have another Mac? If yes, Target Disk Mode - Share files between two computers with target disk mode - Apple Support - is another option.

4. Do you have a DVD with OS X on it? You can try Alt and try booting from the DVD. This may or may not work, if the firmware will not recognize the drive.

Reference - Startup key combinations for Mac - Apple Support

Reply

Answer 6

Jul 1, 2015 5:19 PM in response to Loner T

I tried the Internet recovery, it gave me the message:

apple.com/support -2102F

Reply

Answer 7

Loner T

Level 9

59,471 points

Jul 1, 2015 6:00 PM in response to Hugh Beaumont

Are you using a wireless connection? If yes, please use a wired connection.

Reply

Answer 8

Jul 1, 2015 7:36 PM in response to Loner T

I plugged in an Ethernet cable and restarted the process. There is something resembling a loading bar, but it's frozen at the start and it's taking quite a while. How long should I expect it to take before trying something else?

Reply

Answer 9

Loner T

Level 9

59,471 points

Jul 1, 2015 7:44 PM in response to Hugh Beaumont

There are many factors which can affect the speed. Your ISP, Apple CDN, etc.. This typically can take about 15-20 minutes. If you have another computer or smartphone, you can try a speed/bandwidth test which can eliminate one. If your Mac originally shipped with a OSX version which is older than what you currently have installed, that is the version you will get in Recovery.

Reply

Answer 10

Jul 1, 2015 8:09 PM in response to Loner T

I've been waiting for over an hour with this screen, wondering whether it's working.

Reply

Answer 11

Loner T

Level 9

59,471 points

Jul 1, 2015 8:28 PM in response to Hugh Beaumont

The spinning globe is reassuring. If this does not work, how far away are you from an Apple Genius Bar? Make sure you have good backups of OSX and Windows before you venture close to one.

Reply

Answer 12

Jul 4, 2015 7:04 PM in response to Loner T

Ok so I took it to a local iStore, I simply made a new image onto my hard drive then restored my laptop. The problem is solved, but my bootcamp failed. I shall try again another day. Thanks for your help, I appreciate the support!

Reply

Answer 13

Loner T

Level 9

59,471 points

Jul 4, 2015 7:56 PM in response to Hugh Beaumont

Hugh Beaumont wrote:

I shall try again another day.

Post back when you are ready.

Reply