I'm trying to create a partition in following "Part 2: Preparing your Mac" from this website. I have to create "Ubuntu Boot Loader" in selecting the principal hard drive "APPLE SSD AP0512J Media", select
Name : Ubuntu Boot Loader ->
Format : Mac OS Extended (Journaled) ->
Size: 128 MB, but I got the following error with Disk Utility :
I got the following message when I hit "Show Details" :
Running operation 1 of 1… Checking prerequisites for resizing Logical-Physical volume stack The requested size change for the target disk or a related disk is too small. Please try a different disk or partition, or make a larger change. Operation failed…
Could anyone be able to tell what do I have to do to fix the "Operation failed"?