#MAC USB 3 CARD FULL#

The Inateck one on their own website specifically says it is not compatible with Yosemite or later. Historically most USB3 cards even generic cheap PC ones worked fine in a classic Mac Pro with no drivers, however from Yosemite onwards and especially so for El Capitan more of these cheap generic cards have had issues. Depending on your application can be a big difference. So imagine 4 USB 3 drives running at 5Gbps or 4 USB 3 drives sharing one 5 Gbps connection.

#MAC USB 3 CARD FULL#

The net result is that the better cards with multiple clocks can run all ports at the full USB 3 speed and the cards that share a clock are limited to sharing that available bandwidth across all ports. One note, the very expensive USB 3 cards tend to be more higher performance as they have independent clocks for each port, rather than one clock for all ports.

Have seen some that only work on pre-Yosemite and some that only work Yosemite and newer, so do a bit of research on which ever one you are thinking about. One thing to double check on any USB 3 PCI card is what version of OS X it supports. Have had no drive corruptions issues yet, but still this is not a good message to get on your Time Machine backup disk. Then get an error about the drive not correctly dismounted.

I would not recommend the Inateck KT4006 card - it seems to have a problem when the system spins down a drive due to not being used for a while.

Mac usb 3 card