I just backed up my Mac side because I like to live dangerously and my Windows Bootcamp partition is just for games and testing. Also a great time to BACKUP everything on your Mac and Windows Bootcamp partition. NOTICE – Now is a good time to plug your Macbook in to charge, you don’t want the power going out while changing the MBR. Once you have downloaded gptfdisk double click the file and install the. Get gptfdisk from here:ĭownload the latest version (I used 0.8.6) and because you’re on a Mac you will need the. How to Fix the Broken Bootcamp Partition after Resizing Mac OS X Partitionįirst, we need to download some software to handle the partition fixing. I will provide full instructions to allow me to repeat this process to fix the partition MBR if it ever happens for me again, so you know it should be good. If you can not do either of these two then find someone who can. We will be using terminal and reading things carefully. The solution is to fix the Master Boot Record and tell it that it should add the Windows 7 Bootcamp partition to the bootable drives list it has. Bad idea! because modifying the core Mac partition modifies the MBR (Master boot record), and removes Bootcamp from the startup menu.īootcamp still exists in it’s own partition, it’s just that the boot process on the Mac does not know to look there for a bootable thing. I needed more space on the Windows side so I decided to use Disk utility on the Macbook to shrink the size of the Mac partition, and use the spare space to make a third partition in exfat format. I had a partition of Macbook OS X Mountain Lion and Windows 7 on Bootcamp. How It Started – Macbook Resizing OS X Partition Read the instructions carefully and consider your options. Please read them carefully, if there is anything you do not understand or do not know then please STOP! Although what we are doing is simple, a mistake can lead to big problems that I do not know how to fix. I am in no way responsible for you following these instructions and breaking anything. The 45 page long Apple forum post I used is here: Today I changed my Macbook partition sizes and Windows Bootcamp would not show in the Boot menu.

Bootcamp osx missing