Hello, I just installed a tempo ssd with 2 drives I had raid0 and worked fine. But I went to install sierra and it failed during installation. Further more I found out that you lose your boot manager if you have 5,1 firmware. This is for the Tempo, Tempo pro, and Tempo pro plus. Solution take out the card install drives on mac do installation, put drives back on card. I'm pissed because if I know this I would had not purchased... Update 1: The initial problem seems to be related to my 2009 flashed. Installation failed also with drives installed on the mac. I've booted to the USB with the installation files and it seems to continue working through the installation. Update 2: Installation finished correctly.