Boot Camp - Can Not Log back into Mac OSX

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Boot Camp - Can Not Log back into Mac OSX

Greetings everyone,

I was attempting to install Windows 8 on my 2012 27" iMac. I created the partition successfully and installed the Windows 8 OS. However, I failed to install the drivers on to a USB drive to transfer so I could I update the drivers. I attempted to log back into Mac OSX (I am running Mavericks), and I cannot log back in. I have tried pressing the "Option Key" and it does not give me the list of partitions. I have checked "My Computer" and I can only see the Windows Drivers, but I do not see any Boot Camp. Is there a way I can retrieve the drivers or at least get back into the Mac partition and get the drivers and install them back?

Essentially, my iMac is running as a Windows PC...I would hate to loose 500GB for only less than 120GB. Any help would be much appreciated.

-Chris

Posted on Mar 20, 2015 3:35 PM

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Answer 1

Mar 21, 2015 12:44 PM in response to cmatias8668

I cannot help but wonder maybe your Keyboard is not functioning at startup. try a USB keyboard.

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Answer 2

Loner T

Level 9

59,536 points

Mar 20, 2015 3:47 PM in response to cmatias8668

Windows and Bootcamp is the same partition. Try a SMC reset - Intel-based Macs: Resetting the System Management Controller (SMC) - Apple Support.

If you have accidentally used the whole drive for Windows, you can try Recovery - OS X: About OS X Recovery - Apple Support.

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Answer 3

Loner T

Level 9

59,536 points

Mar 20, 2015 6:27 PM in response to cmatias8668

Shutdown your Mac or Windows. Hold Command+Opt+R and power up your Mac. Do you see a Recovery Console?

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Answer 4

Loner T

Level 9

59,536 points

Mar 20, 2015 6:50 PM in response to cmatias8668

What happens if you power up and hold Command+R?

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Answer 5

Loner T

Level 9

59,536 points

Mar 21, 2015 12:44 PM in response to cmatias8668

After you install it, run it as shown in the first screen shot using

gdisk64.exe 0:

p

q

Post the output. Remove any personal information as you see fit. This will list what the layout looks like.

You may also want to consider OS X: Installing OS X on an external volume - Apple Support and booting from this external disk to look at the disk layout, and correct it as necessary.

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Answer 6

Loner T

Level 9

59,536 points

Mar 21, 2015 4:54 AM in response to cmatias8668

Please download GPT Fdisk (http://sourceforge.net/projects/gptfdisk/) and install it on the Windows side.

You can also use DiskPart in a Admin Command Window.

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Answer 7

Loner T

Level 9

59,536 points

Mar 21, 2015 1:00 PM in response to cmatias8668

From Windows, run a Command prompt with Admin privileges. Change directory to where you the Gdisk installed and type the following commands in sequence.

gdisk64.exe 0:

p

q

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Answer 8

cmatias8668 Author

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Mar 20, 2015 6:37 PM in response to Loner T

I shutdown the Mac and held Command+Opt+R and powered it up. It still does not do anything. Windows just boots up. I have a copy of my Old Snow Leopard OSX it does not recognize the CD nor would let me reinstall it. Also, I check Yosemite and Mavericks and does not do anything it, it does not recognize my Mac as a Mac. Seriously about to throw my iMac out the window...probably more costly then checking here. Anything else you can think of is greatly appreciated. Thank you! 🙂

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Answer 9

cmatias8668 Author

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Mar 21, 2015 12:54 PM in response to Loner T

Hi am I just suppose to click the application and run it? I'm not suppose to type in any commands? If not, then nothing is happening when I do this. All it says is "Type Device filename, or Press <enter> to exit".

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Answer 10

cmatias8668 Author

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Mar 21, 2015 12:55 PM in response to DheemanF04

I do have a wireless and currently do not have a USB keyboard. I heard about someone who had a similar issue and switched keyboards and this was a fix for them. So I may need to borrow one from work next week. I'll see what happens then.

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Answer 11

cmatias8668 Author

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Mar 20, 2015 4:03 PM in response to Loner T

Hi Loner T,

Thank you! I have tried these before and these do not resolve my issue either. SMC reset did not do anything and OS X Recover seemed to have frozen at the Windows Start.

-Chris

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