I have two partitions – one with Mac OS, and another with Windows 7 (created by Bootcamp). Now, I want to create two more partitions for Linux – LINUX and LINUXSWAP. I open Disk Utility and specify new partitions using + button in the mas disk. Then I click apply. Application returns strange message partition failed with the error: couldn't modify partition map because file system verification failed. I googled for that problem and everywhere people advice to repair disk using boot CD with MacOS which leads to deinstalling all applications, perhaps, losing windows partition and very time consuming. I don't like this way. Do you have an idea how I can create just two partitions for my Linux?
MacOS – Disk utility can’t add partitions
disk-utilitymacospartition
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Best Answer
There might be a misconception somewhere in what you say. You can run Disk Utility from the original system disc WITHOUT re-installing OS X.
I ran into a similar problem recently, on which running Disk Utility from any of the existing partitions would not work. I then tried running Disk Utility from a restore disk I had copied to an external USB-drive and to my surprise it was not successful either. Ultimately, the only way I was able to get Disk Utility to re-partition my drive was when I executed it from the original system CD that shipped with my Mac.
Again, you can launch Disk Utility from the setup start up screen by selecting it from one of the menus. You do not require to re-install OS X. Hope this helps.