Apple Event: May 7th at 7 am PT

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

yk052052 Author

Level 1

0 points

Bootcamp partition disappeared..

Previously I've had three partitions. MAC OSX + BOOT CAMP + Shared Partition(FAT32)

For upgrade to EL CAPITAN, I used bootable USB. Using disk utility I erased MAC OSX for clean installation and proceeded installation.

But I got an error massage saying "OS X could not be installed on your computer. This partition map modification would make a windows partition unbootable".

Untill this moment, I could see bootcamp in boot mode selection when I tried . For solve the problem above, I tried to resize MAC OSX partition. (MAC OSX partition was 250GB and resized it to 249GB) and I found 1 more partition created with 1GB. I reuninified them as original size 250GB.

I tried to reboot the MAC and since I couldn't find any bootable disk except USB disk and I'm getting same error massage when I tried to install OSX.

Where do I have to start and what do I have to do.

Please give me any say

MacBook Pro (Retina, 15-inch, Mid 2014), Mac OS X (10.7)

Posted on Oct 7, 2015 7:22 AM

19 replies

yk052052 Author

Level 1

0 points

Oct 10, 2015 9:51 PM in response to Loner T

shared partition is exFAT. I think once I revive OSX and Bootcamp, might be able to fix this shared partition from bootcamp as I have done so far.

Loner T

Level 9

59,471 points

Oct 11, 2015 4:39 AM in response to yk052052

You can run diskutil verifyVolume on the shared partition.

yk052052 Author

Level 1

0 points

Oct 11, 2015 7:24 AM in response to Loner T

I anyhow reinstalled window on bootcamp and revive the shared partition.

Now only thing left is I cannot install OS X on MAC partition due to error massage as described at first in my thread.

""OS X could not be installed on your computer. This partition map modification would make a windows partition unbootable"."

Loner T

Level 9

59,471 points

Oct 11, 2015 11:02 AM in response to yk052052

If you build a custom Hybrid MBR, you may be able to upgrade to ELC. Be aware that you may have to wipe your Mac clean and attempt the ELC installation, if necessary.

Bootcamp partition disappeared..