model optical output optical input
Macbook Air 2008-2015 no macbook air features optical out  
Macbook Pro Early 2006-Early 2009 mini-toslink 3.5mm mini-toslink 3.5mm
Macbook Pro 13″ mid-2009, mid-2012 mini-toslink 3.5mm  
Macbook Pro 15″ mid-2009, mid-2012 mini-toslink 3.5mm mini-toslink 3.5mm
Macbook Pro 17″ mid-2009, late-2011 mini-toslink 3.5mm mini-toslink 3.5mm
Macbook Pro Retina 2012 mini-toslink 3.5mm  
Macbook Pro Retina 2013 mini-toslink 3.5mm, up to 192 kHz  
Macbook Pro Retina 2014  mini-toslink 3.5mm, up to 192 kHz  
Macbook Pro Retina 2015  mini-toslink 3.5mm, up to 192 kHz  
Macbook Pro Retina late-2016  no toslink anymore!  
Macbook Mid 2006 – Mid 2009 mini-toslink 3.5mm mini-toslink 3.5mm
Macbook Late 2009 mini-toslink 3.5mm  
Macbook Mid 2010 mini-toslink 3.5mm  
Macbook 12″ 2015 no optical output  
Macbook 12″ 2016 no optical output  
Airport Express 2004 mini-toslink 3.5mm  
Airport Express 2008 mini-toslink 3.5mm  
Airport Express 2012 mini-toslink 3.5mm  
Apple TV 1 standard S/PDIF   
Apple TV 2 standard S/PDIF  
Apple TV 3 standard S/PDIF  
Apple TV 4 no optical output, HDMI only  
iPad with lightning port no optical out, USB audio possible  
iPhone with lightning port no optical out, USB audio possible  
Apple Watch really not  
Mac mini all starting from Early 2006 Early 2006+ 
Mac mini (Late 2014) mini-toslink 3.5mm, up to 192 kHz  
iMac all starting from iMac G5 (2004) Mid 2006+
iMac (21.5-inch, Mid 2014) mini-toslink 3.5mm, up to 192 kHz  
Mac Pro (late 2013) mini-toslink 3.5mm, up to 192 kHz