I have a late-2013 MacBook Pro running the latest Mac OS Sierra (updated this afternoon). I have Windows 10 installed on a Boot Camp partition.
I decided to decrease the size of the Mac OS partition as I'm running low on space in the Boot Camp partition. So I used Disk Utility to shrink the Mac OS partition, then formatted the unused space as FAT32.
There were no reported problems.
I then restarted the MacBook. It's set to boot directly into Windows, but when I restarted all I got was a blank screen. I waited... but got nothing.
So I forced the MacBook off (holding the power button) and restarted again, this time holding
⌥: I got to the partition selection screen, from where I clicked on "Windows". It froze. The pointer becomes unresponsive. Again, nothing.
I can still start up and select to boot into Mac OS but I can do nothing with the partition from where I do my job, leaving me in a bit of a panic.
In Disk Utility, I've clicked on the top-level disk, "Apple SSD", and selected "Repair", and after ~2 seconds it said something like "OK". I don't have an option to click on "Repair" when I click on any of the partitions.
I haven't used any third-party software, using only Disk Utility for its own purpose, and haven't touched the Windows partition.
Please, can someone tell me how to get my Windows partition booting once again.
I've since removed the empty partition which I had cerated, merging it back into the Macintosh HD partition.
Here is the output from running
/dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *500.3 GB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_CoreStorage Macintosh HD 249.4 GB disk0s2 3: Apple_Boot Recovery HD 650.0 MB disk0s3 4: Microsoft Basic Data BOOTCAMP 249.6 GB disk0s4 5: Windows Recovery 471.9 MB disk0s5 /dev/disk1 (internal, virtual): #: TYPE NAME SIZE IDENTIFIER 0: Apple_HFS Macintosh HD +249.0 GB disk1 Logical Volume on disk0s2 EAD39943-E2B3-41BA-94C4-319E53324ECD Unencrypted