I try to install Windows using a boot camp disk, but fail in progress due to serious partition issue. So I give up, and delete partitions created through boot camp. And now, I can no longer recover or create those partitions under mac, and I cannot fox partition table even using Yosemite installation disk. I use diskutil to delete partition, not using disk utility since El Capitan does not support unsupported partition modification. I try to use diskutil but there is no luck. Using Yosemite disk utility brings me this warning message: MediaKit reports partition map too small. How to solve this issue? El Capitan works normally, but boot camp stops working.