Hey all,
I know this is a few months on, but if anyone else is having this problem on newer Mac Pros (post expansion slot utility), the Kona LHe MUST be in either PCIe slot 1 or 2.
I was having seriously annoying sync and drift issues after getting a new Mac Pro* and realized I had installed the card in slot 3. Once I swapped it into slot 2, everything is running perfectly.
I was worried that Mountain Lion killed the Kona LHe or FCP 7.03, but everything is running smooth as butter (except for banding on my 23 in cinema display, but I don’t really care cause my Flanders Scientific LM-1760W looks so beautiful it hurts..)
Scott
https://www.590films.org
https://www.faithinthefiveboroughs.org
*Mid 2012
Processor 2.8 GHz Quad-Core Intel Xeon
Memory 13 GB 1066 MHz DDR3 ECC
Graphics ATI Radeon HD 5770 1024 MB
Software OS X 10.8.2 (12C60)