Handoff option not visible on General Preferences
For Me the HandOff option is not available in the General Preferences for MacBook Pro
MacBook Pro, OS X Yosemite (10.10)
Support for Handoff is not available in all models of Mac.
Specs: General Requirements, Feature requirements and What”s Included
http://www.apple.com/osx/how-to-upgrade/
You can check it.
Click in the menu bar.
About This Mac > More Info.. > System Report > Hardware > Bluetooth