Chosen Solution
I am using a 2012 Mac Pro Intel and I attempt to transfer files between hard drives that are USB 3.0 connected, as well as other connections from time to time. More often than not the drives I am copying to will disconnect during the transfer. the USB 3.0 card I am using is: [Black Edition,Power Cable included,Compatible with Mac OS X V 10.7.5 or Later and Windows] ORICO PME-4U USB 3.0 4 Port PCI Express to USB3.0 Host Controller Adapter Card , Advanced Version of ORICO PFU3-4P Thoughts?
I’ve had some problems on Mac Pros after upgrading systems sometimes. Even Sonnet cards. Sometimes I have had to wait for new drivers to be developed. The first thing I would do is go to their site and check for driver updates or discussions about system limits and their cards.
