Why are you using a Mini-Toslink from your MAC headphone output to the Luxman D-05 Toslink digital input? Am I missing something?
I suggest you use the USB connection on your MAC Book Pro computer to your Luxman D-05 DAC. I also have a MAC Book Pro computer and use a USB cable from the computer to my Ayre QB-9 DSD DAC. It works fine.
Setting up the computer is not easy and I hope the information below helps. I suggest you review the following web site for setting up your MAC computer for connecting to your Luxman D-05 DAC:
http://www.ayre.com/usb-dac-apple.htm
http://www.audioquest.com/pdfs/CA-Setup-Guide.pdf
Audio Midi Setup: Set up your audio devices
https://support.apple.com/kb/PH5176?locale=en_US
http://www.usbdacs.com/Macintosh/Macintosh.html
I hope my above links work. If not, please copy and paste to your browser.
I suggest you use the USB connection on your MAC Book Pro computer to your Luxman D-05 DAC. I also have a MAC Book Pro computer and use a USB cable from the computer to my Ayre QB-9 DSD DAC. It works fine.
Setting up the computer is not easy and I hope the information below helps. I suggest you review the following web site for setting up your MAC computer for connecting to your Luxman D-05 DAC:
http://www.ayre.com/usb-dac-apple.htm
http://www.audioquest.com/pdfs/CA-Setup-Guide.pdf
Audio Midi Setup: Set up your audio devices
https://support.apple.com/kb/PH5176?locale=en_US
http://www.usbdacs.com/Macintosh/Macintosh.html
I hope my above links work. If not, please copy and paste to your browser.