Lightning DmxControl is a simple dmxcontroller for Mac OSX with 24 channels and 12 presets. It can output DMX an Enttec Open DMX USB or Enttec DMX USB PRO Interface or Artnet 0:0 or a dmx4all miniUSB device. Further, it is remotely controllable by any Midi Controller. There is also a 'pro' version with 64 channels and 24 presets available for 32,99 dollar in the Mac App Store. It has a simple patchbay.
You can create presets by rightclicking a preset fader and choose 'Create Preset from Channels' from the context menu.
You can also use a MIDI Remote to control the faders. To do so, rightclick a fader and choose 'Midi Learn' from the contextmenu. Move a fader on the Midi Remote and it will be coupled.