Recording iOS Screen Over Lightning to Mac
Apple has added a handy feature into OS X to easily capture the screen of an iPad or iPhone on the Mac itself. Apple positions the feature as a way to help developers quickly make app previews, which Apple introduced as part of iOS 8’s improvements to the App Store, but there is no reason why this couldn’t be used by others for different purposes.
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In testing, the recording is currently extremely laggy. It is reasonable to expect video quality will improve significantly as iOS 8 and OS X Yosemite approach public release.