How to update from OS X El Capitan 10.11.6 to OS X Sierra 10.12? I need to update my MacBook Pro (15-inch, Late 2008):



from OS X 10.11.6 (El Capitan) to OS X 10.12 (Sierra) due to an incompatibility with Traktor:



How should I proceed?
I'm afraid your 2008 MacBook Pro can't update to 10.12. That OS doesn't support your hardware. 

You'll need to find an older version of the NI software.