Hey all, I have a 2008 24" iMac running El Capitan 10.11.4. I have a USB flash drive that I keep for diagnostic and troubleshooting purposes. It is formatted HFS+ with the GPT partition scheme. I have 6 partitions on the drive: 5 of them are bootable OSX installers for the most recent OS X versions, and the 6th one is a diagnostic partition that is a bootable El Capitan system with various troubleshooting software on it, such as DiskWarrior, Data Rescue, etc. I've enclosed screenshots of the drive in Disk Utility and the Terminal output from the diskutil -ls command for reference. My question is this: I would like to be able to enlarge my Diagnostics partition by shrinking one or more of the other partitions, which have some free space. Is this possible? And can I do it non-destructively? It seems like the only way to make it work is to delete one or more of the partitions in order to reclaim the newly freed space, and then remake the partition. I wasn't able to resize the partitions in Disk Utility (DU) initially. I converted a couple of the partitions to CoreStorage, and then I was able to actively resize them in DU. I'm not worried of having to do Terminal commands to get the job done, or even using a third party partition tool, such as iPartition. Any helpful advice would be greatly appreciated!