Configuring native shutdown on Mac OS X
How to configure native shutdown of Mac OS X
Mac OS X attached to UPS via USB cable
NOTE: According to Apple, Energy Saver options are unavailable for UPS on portable devices, e.g., MacBook, MacBook Pro, and MacBook Air. See Apple discussion thread 8398176.
Please review the Apple support document "Set when your Mac shuts down while using a UPS" at this link