Hi,
I have had to restore my MacBook to factory setting three times in the last two weeks, and I believe the problem is being caused by Rekordbox. When I try to import a certain song, it completely messes up my computer. I'm not entirely sure which song it is, as I've been importing a lot at the same time, but I'm 99.9% sure the problem is Rekordbox. It is bad enough that it completely messes up my whole system. I'm running the latest version of Sierra, with the latest version of Rekordbox. I never had this problem with the older versions of Rekordbox. Is there any way for me to download a less recent copy of Rekordbox. It's a pain in the backside having to delete my whole hard drive and start again!