I'm tired of waiting 2-3 days for my iMac to transcode 4K Video knowing it has more to offer that FCP isn't utilizing. iMac 5K Core i7 4Ghz w/ 32GB of RAM, Raderon 395X and 3 terabyte Fusion drive. ==== It's been 24 hours since I started encoding 600 gigabytes of 4K files off multiple cameras. FCP is only maxing out at 100% CPU (1 out of 8 cores) as i have iStat Menus pro set to 800% as maximum and it's not touching the Radeon processor. It's not even hot air coming out of the back. All of the files are stored locally. I/O isn't being taxed at all. I have every application closed on this mac except Safari and FCP. I want FCP to use every bit of processing power the iMac has. It'll take a week to transcode these videos at this rate. Why is it so slow? how can I fix this? FCP 10.4, latest version of Mac OS.