This may sound really complex for many people but it's the only way I could upgrade the firmware on my 2011 MacBook Pro 15" without using Windows.
1.
Download Ubuntu 32bit.
2. Burn that image to a CD using Disk Utility.
3.
Download this script.
4.
Download the Linux firmware update tool.
5. Move both the script and firmware update tool to a MS-DOS (FAT) flash drive (you can partition a flash drive to FAT using Disk Utility).
6. Put the CD that you burned in step 2 into your computer and restart while holding down the "C" key to boot from the disk.
7. Once Ubuntu starts, find and open the Terminal.
8. Move the files from the flash drive to the desktop.
9. In the Terminal, first type
sudo -s and press Enter.
10. Next, type
chmod +x then drag one of the two files you moved to the desktop to the terminal window and press Enter.
11. Repeat step 10 with the other file.
12. Next, type
cd ~/Desktop into the Terminal and press Enter.
13. In the top left corner of your screen look for what looks like a power symbol. Click that and choose suspend.
14. Close your computer, wait a few seconds, then reopen.
15. Type in
./IDE2ACHI into the Terminal and hit Enter then follow the directions in the terminal window. When it asks if you want to suspend, choose no.
16. Type in
./fwupd -log /dev/sda and hit enter. This will update the firmware on your drive.
If you don't feel up to doing this then don't worry about upgrading your firmware. It's a complicated process at this moment but there is someone at OCZ working on a mac compatible firmware update tool that should be done in a few months.