Mac OS, or Apple's operating system, comes preinstalled on all NMU-issued MacBooks.
Below is a list of training resources for OSX.
Using OSX (Apple Support)
Getting Started with OSX (Apple Help)
HelpDesk Mac OS Keyboard Shortcuts Guide
NMU help and how-to documentation for OSX
Search Books 24/7 for online material through the NMU Library
Online OSX resources with GCFlearnfree.org
Register for any HelpDesk courses currently available.