Q: Unable to install Bootcamp and partition problem
Hello guys, I really need your help. I can't install Windows to Bootcamp partition anymore.
So I did read lot of posts about the partition problem but seems like I can't fix the problem at all and I think my problem is very critical. Here is how things all went wrong:
- I was trying to update OS X version 10.11.5 from the Mac App Store.
- After rebooting my Macbook I got the error message "OS X could no be installed on your computer...".
- I tried to find the solution and I found this: https://support.apple.com/en-us/HT203482
- I did what the website told me, I used Disk Utility to resize the Mac's partition (at that time i was having Windows 10 Bootcamp on my Mac). So the trick did help I was able to update OS X to 10.11.5. After that I had resized the Mac's partition to its normal size. (I was very careful not to touch anything else like Bootcamp)
- The next day I rebooted my Mac to use Windows but from the boot screen i only saw "Macintosh HD", I booted back in OS X and went in setting to set my startup disk as BOOTCAMP, after restarting the black screen said:" No bootable device..."
- I went to the web and find every solution and I have formatted BOOTCAMP partition and erased all of its data, now my Bootcamp Assistant said: "The startup disk cannot be partitioned or restored to a single partition.". I have tried installing Windows 7 from USB stick, i selected Bootcamp (Partition 4) but now i have this: "Windows cannot be installed to this disk. the selected disk has an MBR partition table. On EFI systems, windows can only be installed to GPT disks MBR can’t support...."
Now I can't find any way to install back my Windows to the partition, i read on the internet that OS X sees the partition as GPT and Windows sees it as MRB. Here are some pictures may help: 
My Macbook HDD has 3 parts: Macintosh HD (use for OS X), Bootcamp (used for installing Windows), and DATA( use to store large data)
MacBook Pro, OS X El Capitan (10.11.5)
Posted on Jul 8, 2016 1:09 AM
1. Do not interrupt the installation process.
2. I suggest using BC Assistant to remove the current BC partition and starting the BCA procedure again.
3. Please run the following two steps prior to the next attempt of Windows installation.
Reset the System Management Controller (SMC) on your Mac - Apple Support
Posted on Jul 9, 2016 10:51 PM



