Mac here as well. No issues. Download the zip, OSX has a built in zip extractor.

1.)Download the .zip directly to your flash drive
2.)Double click the .zip file on the flash drive, the file will extract

That's it. The update software (on the pinball) reads directory structure, or you can copy/paste the file from the extracted directory to the root of the USB stick if you want.

Otherwise, flip the dip switch, turn the game on, then follow the on screen prompts.

One quirk for me, when I got to the point where it says "insert flash drive" the game didn't detect it. So with the flash drive in I power cycled the game, re-did the upgrade procedure and didn't have an issue.

One potential Mac related issue could be your thumb drive isn't formatted FAT, but IIRC, OSX will format it FAT by default so you should (should being the key word) be okay.

No problem man. The game feels a bit easier after the update. I'm not getting my shaker until tomorrow so I don't know much about that, which was the big feature improved in the update.

I did not order the shaker through JJ, I think they are still waiting on their stock from Stern.

I saw the inserts all change color on WOZ at the same time, which is not the point of the AC/DC color changing inserts. AC/DCs inserts are going to change colors individually based on objectives etc. Am I missing something with he WOZ inserts? Their code is early as well so I'm sure it'll come around, but for now it doesn't seem like anything special.