Allegro USB 3.0 PCIe
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Driver (3)
Firmware (0)
Manual (2)
FAQ (9)
IDArticle TitlePost Date
523 Does the Sonnet Allegro USB 3.0 PCIe card support the Blackmagic Intensity Shuttle, Pocket UltraScope, and UltraStudio Pro?May-03-11
641 Why is my USB 3.0 card reporting a USB 2.0 connection to a USB 3.0 storage device?Jan-10-12
The card is actually making a USB 3.0 connection and it is just a reporting bug.
 
668 Does my Sonnet USB 3.0 card work with OS X 10.7.5?Sep-04-12
681 Are Sonnet's USB 3.0 cards compatible with OS X 10.8 (Mountain Lion)? Sep-04-12
726 Does the Allegro USB 3.0 card support bus-powered drives? Nov-27-13
732 Do the Sonnet Allegro USB 3.0 cards support Thumb Drives?Oct-24-13
Yes, all the Thumb Drives Sonnet has tested are compatible.

Sonnet has tested the:
•ADATA Superior Series S102 Pro USB 3.0 Flash Drive (\f1 82 MB/s read - 21 MB/s write)\f0
•Lexar JumpDrive S73 USB 3.0 Flash Drive (\f1 37 MB/s read -12 MB/s write)\f0
•SanDisk Extreme USB 3.0 Flash Drive (\f1 180 MB/s read - 145 MB/s write)\f0
•Transcend JetFlash USB 3.0 Flash Drive (\f1 39 MB/s read - 34 MB/s write)
 
756 Do the Sonnet USB 2.0 or USB 3 cards support the Apple SuperDrive?Apr-02-22
None of Sonnet's Cards with USB 2.0 or USB 3 (either Type A or Type C) ports support the Apple SuperDrive. You must use a built-in USB 2.0 or 3.0 port on your Mac.

According to http://support.apple.com/kb/HT5630, "The Apple USB SuperDrive is compatible with Mac models from 2008 and later that don't have a built-in optical drive."
 
759 My bus-powered USB 3 drive or SSD will not reliably mount or transfer data.Dec-14-19
817 Storage connected to a USB 3 PCIe card (or Tango combo card) gives an macOS error message upon wake from sleep.May-12-20
To minimize power usage during sleep, power is removed from PCIe cards. Because of this power-saving specification, a USB 3 PCIe card is unable to maintain USB port power during sleep. In macOS, this result in a storage device disconnect upon wake from sleep. The storage device will automatically remount, but the system reports a disconnect message. Because macOS flushes all caches before sleeping, this disconnect should never result in any loss of data.