Just unpacked my new Keylab 25.
Registered and downloaded and installed all the software on my Macbook. (10.9.4)
Software and updates loaded ok.
Plugged the USB Controller in and the LCD screen lit up with blanks instead of letters or numerals.
Thought it might be an insufficient power supply from USB port so I plugged ii into a power supply but got the same display error.
The Mac sees the controller but none of the software recognises it or responds to it?
Followed the Mac hardware error suggestion. Held SOUND+MULTI+EDIT for 5-10 seconds and got nothing. Tried holding and rebooting, still got nothing.
Pic if screen below