Hi, I was having problems with my late 2013 27" iMac slowing down to molasses. To make a long story short, I removed my Boot Camp partition in internet Recovery Mode (command-option-r) using Disk Utility and the Partition feature instead of Boot Camp Assistant (really dumb mistake). I selected the partition, clicked the minus button, and clicked Apply. Everything seemed to be proceeding as planned until about 3 hours into the process, I received a spinning disk. I left the computer running for 3 days until today I decided to force shutdown the computer as I thought it was not doing anything. I started the computer in internet Recovery Mode, went to Disk Utility, and it is showing my Fusion Drive as 2.09 TB instead of 3.09 TB, so basically it is not showing the Boot Camp partition in Disk Utility, but it is still showing that 1 TB is not available. I reinstalled macOS Sierra, and when I go to Disk Utility > Partition, under Device Information it does show the size of the HD as 3 TB but only shows one partition and it lists the partition size as 2.09 TB. Could someone please tell me how I can recover this missing space and basically reset my HD as new? Thank you very much!