Having updated Mavericks for USB Latency I was still getting a few emails from customers about Yosemite. Because I use my macbook as my main machine running Mac, Windows and DOS and do all my work on this computer I was reluctant to upgrade just in case of problems.
Whilst in the USA for NAB I bought a new macbook with Yosemite pre-installed I can now use this machine for trying out new programs. I followed the posted instructions and disabled the Apple driver. You can use the 'ls' command to check that the driver has been disabled (Renamed). I then went to the FTDI web site where I discovered that FTDI had posted a new driver for the Mac that very same week! Version 2.3 2015-04-15. I installed the new FTDI driver, used KextDrop to add the low latency driver and restarted the computer. Everything worked OK and the port was discovered correctly.
Whilst in the USA for NAB I bought a new macbook with Yosemite pre-installed I can now use this machine for trying out new programs. I followed the posted instructions and disabled the Apple driver. You can use the 'ls' command to check that the driver has been disabled (Renamed). I then went to the FTDI web site where I discovered that FTDI had posted a new driver for the Mac that very same week! Version 2.3 2015-04-15. I installed the new FTDI driver, used KextDrop to add the low latency driver and restarted the computer. Everything worked OK and the port was discovered correctly.
I had to wait until I got back to my office to measure the latency, as you can see below it measures at 1mSec s expected. The Yellow trace is the command from the Mac via the USB422 and the Blue trace is the reply from our RM-6 synchroniser. They are both set up to send a message immediately after receiving a message. The USB runs a 1mSec poll so that there is approximately a 1mSec delay on the Mac. The embedded software reacts a lot faster as it is not limited by the USB Poll.
