Boot Camp refuses to work, cannot partition disk.

TheSLSAMG · March 30, 2019

So I have an A1466 Early 2015 MacBook Air and I wanted to run the machine with Boot Camp so I can switch between Windows 10 and macOS Mojave. However, the Boot Camp Assistant refuses to partition the drive, prompting me that "Your disk could not be partitioned. An error occurred while partitioning the disk. Please run Disk Utility to check and fix the error."

I've tried the following to solve the problem:

Ensuring FileVault is turned off (it was, did not fix the issue.)
Running First Aid on the boot drive in Disk Utility (finds no issues, does nothing to fix the issue.)
Reinstalling macOS using Internet Recovery, fully wiping the drive (didn't help.)
Turning off iCloud Drive (also did nothing.)

The system is formatted as APFS without any encryption. The OS is updated to the current macOS Mojave 10.14.4. The machine as previously mentioned is an Early 2015 MacBook Air A1466 with the Core i5-5250U, 4GB RAM and the factory 256GB SSD. The Windows 10 ISO I am using is provided by Microsoft.

Any help would be appreciated.

TheSLSAMG · April 1, 2019

On 3/30/2019 at 5:15 AM, VegetableStu said:

was your MBA's disk partitioned beforehand in any way? Bootcamp Assistant can be very picky ._.

worst case is to manually partition the disk yourself in Disk Utility (add a FAT32 partition (that's not part of the APFS extension) and name it anything for the time being) and boot to the USB installer to reformat the new partition for NTFS.

not sure if this works for newer macs, it's the general case for my 2012 MBP ._.

Oddly enough, after reimaging the machine a couple of times, it finally ended up working. It seems that Boot Camp is exceptionally buggy nowadays, I didn't have to do any of this back when I had a Mac Mini in 2013. Thank you for commenting.