I tried later in this guide community post here: error: 'we could not create a new partition or locate and existing' install Windows via Bootcamp 8.1, but no luck. The partition has been formatted to NTFS. I let bootcamp create partitions, but to the partition/disk screen hard to choose, I get a message saying: 'we could not create a new partition or locate a. One dedicated to OSX and one for Windows. This error occurs on my 2012 15-inch MacBook Pro. Error: 'could not create a new partition or locate a' when installing Windows via Boot Camp 10
