Force BootCamp to use GPT

I have installed BootCamp manually to the last partition on my SSD /dev/disk0s13. It works, no problems, but every time I manage my partitions from OS X (or any other OS that is not Windows), the computer creates a new hybrid MBR, which makes Windows unbootable because it can’t find the Windows partition. I have … Read more

Importing Linux and Windows Dual Boot from Parallels

I am looking at triple booting my Mac soon with macOS, Linux and Windows. I also want Linux and Windows available as a virtual machine. At the moment, I have Windows dual booted and have imported it into parallels. I will be formatting my hard drive soon and reinstall macOS on it. I will then … Read more

Linux on Mac, dual-boot without rEFind EFI issues

So I followed the instructions here This actually worked great. I was able to install ubuntu and the dual boot is working, however, in my startup window I have a dummy Windows option that boots to nothing. I did have bootcamp installed previously but have since wiped my drive clean to install Mojave. The windows … Read more

iMac disk partion FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF and fusion drive unlinked

I was trying to uninstall linux mint and was trying to restore the partitions back to one. Somehow I ended with the one of the partition labeled FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF. This are the information from diskutil: /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk0 1: EFI EFI 209.7 MB disk0s1 2: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF … Read more

Partition Type: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF on Macbook Air; gpt add error

[Solved] I recently installed Kali Linux onto my MacBook Air 2015, and shortly after, realized that I needed to install Refind to get the full functionality. I deleted the partition, which is 20 Gb, from disk utility in MacOS. I closed my laptop for a while, and when I came back, I was met with … Read more

On dual-boot macOS/Ubuntu Mojave install failed with “This disk cannot be used to startup your computer.”

My box is mid 2012 MacBook Pro, 1 TB HD, Sierra 10.12.6. It has dual-booted with Ubuntu using rEFInd until the High Sierra installation failed, after which I only used Ubuntu. After uninstalling rEFInd I’m attempting to upgrade the macOS side to Mojave and get the error above. I’ve already run First Aid on the … Read more


I was trying to install Linux on my MacBook for class when I bricked my computer, which now in an unbootable state. I made my partition too small, so I was going to delete and create a larger one. However, Disk Utility did not allow me to delete the small partition. I followed the instructions … Read more