I thought about buying the Mac version of the Das, but I ended up getting a Matias Tactile Pro 3 instead. This keyboard is LOUD, but very satisfying to type on.
My chief complaints with the Das (the reasons I decided not to buy it) are:
1. The glossy black casing screams fingerprint magnet.
2. The USB hub ports are all on the right-hand side of the board. I like being able to plug my mouse into the left-hand side like you can on an Apple keyboard (I'd be constantly bumping up against the mouse cord otherwise as a right-hander). The Matias TP3 has ports on the left, back and right. Also, the Das requires a second USB connection for the hub. The Matias does not.
But after about a week of use with the TP3, there are some drawbacks to note:
1. I tend to bottom out on the keys quite a bit because the force required to actuate its ALPS switches is quite high (about 65g). It's worth noting that the actuation force on the Das (which uses Cherry MX Blue switches) is about 10g less.
2. The board emits a slight pinging noise (presumably caused by the keys bottoming out on the metal plate) when typing quickly. I've been considering pulling the keycaps off and dampening them with rubber o-rings because of this.
3. The keycaps are somewhat loosely mounted to the switches. There is a noticeable amount of "wiggle" to the keys while resting your fingertips on them.
4. It lacks the media functions (Expose, Dashboard, transport controls, etc.) present on an Apple keyboard. Also, it does not have a function (Fn) key to map secondary commands to F1-F15. Kind of a bummer. If you ask me, I rather have an Fn key in place of the Help key (useless to me) in the center stack. Another oddity is the Option keys being single key width.
5. The Caps Lock key uses a linear (not tactile/clicky) switch, perhaps because of its built-in LED. Not a big deal to me, but perhaps it would be to certain programmers who would want to remap this key to Control.
But despite the drawbacks, I'm pretty happy with my TP3. It's a great keyboard for veteran Mac users that miss typing on a proper mechanical board and don't mind the noise.