Handoff will be one of the coolest features of OS X Yosemite and iOS 8, letting you seamlessly transition between workflows on the two platforms, but unfortunately for owners of older Macs, it will require Bluetooth 4.0, which excludes Macs built before 2011, and even many built later. Peter Cohen of iMore explains how to check which version of Bluetooth your Mac has. If your Mac isn’t compatible with Handoff, a USB dongle that provides Bluetooth 4.0 may enable Handoff by Yosemite’s release. follow link
How to Make an iPhone Screenshot
Want to take a screenshot of something on your iPhone or iPod touch? Press the Home button and Power button briefly at the same time, and an image of your screen will be saved to the Photos app (and will sync with iPhoto when you next connect). Don't hold the buttons too long or your device will either power down or reboot.
OS X Yosemite’s Handoff Will Require Bluetooth 4.0