Hi. I would be careful about previous statement. I bought the UR44 yesterday, and the installation on my iMAC (iMac 27, Intel 3,8 GHz Quad Core, 40GB RAM, late 2017, High Siera latest release) went partially until the third attempt. I downloaded the latest version of the software (TOOLS for UR44 V2.1.3 for Mac, Yamaha USB driver is inluded). After the installation and restart the system did not recognize the UR44 card. I had to download last Yamaha USB driver (1.9.10-2) separately, reinstall and restart …and play with CC mode switch on UR44. Now, UR44 is working under OS but can not be used with Cubase (Pro 9.5). After the Cubase starts and loads all components a message appears that new audio interface UR44 was detected but the USB card imediatelly losts (even from system settings), so it is possible to continue loading porocedure with the standard Asio driver only.
I am going to continue today evening … hoping to solve this issue.