I completely understand how confusing it is. To better understand everything, think of it this way.
Firmware is the software stuff that is inside any digital electronic device, like your DM, or your FW card. It is this software that makes your device work within itself, telling it to do something when you push a button or move a knob.
A
Driver is the software that is in windows or your mac that tells the computer how to use the device and what to name it.
Unfortunately, it takes a few different drivers and two firmwares to make this all work.
You can find the current beta Firmware and Drivers for everything at this website:
https://dev.tascam-parc.com/parc_beta/ username:iffwdm Password: firefly
Once you get to the website, you will see lists of drivers and firmware.
The current Firmware for your DM is version 1.72b3. You can download it to your mac, then unzip it. Now open Tascam Companion, click on WINDOW and firmware updater. Your DM should be listed with the current Firmware version next to it. To update, click OPEN, find the file you just downloaded and unzipped, and then click on UPDATE. Everything will restart.
The current Firmware for your IF-FW/DM card is version 1.1. To check and see which version you have go to ALT/DIGITAL/SLOT. Look under VERSION. If you have a different version, like 1.0, go to the Tascam product page for the FW card and click on downloads. Download 1.1 and run it's setup.
Now on to drivers...
There really isn't a driver for your DM since Tascam Companion is the software that works over your USB connection to send data to/from your DM, as well as firmware updates. But your computer
does need to know how to work with that FW card you crammed into it. So, that needs a driver. Go to the website above to get the latest driver for your FW card and install it. For your mac, it's V1.30f10, near the top of the list.
So, to summarize,
Latest Tascam Digital mixer.....
Firmware...V1.72b3 from website
Driver....Tascam Companion v1.51 from Tascam product page
Latest IF-FW/DM MKII...
Firmware...V1.1 from Tascam product page
Driver...V1.30f10(mac) f9
(WIN)
One more driver to worry about. This is for anyone using a windows machine. (mac users, go about your business...nothing to see here...
Windows has it's own driver to make the IEEE 1394a (FW) buss host controller work. It comes with every version of windows and was probably installed automatically when you first plugged in your DM (or any FW device). But the version it installs is a newer version that doesn't seem to work as well as the older "Legacy" version does. So, if you are interested in changing it, go to device manager, find the 1394 buss host controller and right click on it. Select "Update Driver Software", Browse my Computer, Let me pick from a list, 1394 (Legacy). Double click to install. Restart. It might/should help pass audio a little better.