Yesterday Apple released iOS 10.3 and macOS 10.12.4. So I upgraded mine. But then there a big issue happened to me. I cannot record my iPhone screen anymore. I've tested on other iPhone with last version of iOS, and it worked. So I am sure this is a bug to iOS 10.3. I hope Apple can solve this very soon. This bug is important to me.
iPhone 5s, iOS 10.3
Same here, after updating to iOS 10.3.2 beta 5 my iPad Air is working fine with QuickTime
After receiving iOS 10.3.2 beta 5 (14F5089a) on my iPad Air 1st Gen, all running as it should!
It looks like my 5S is working fine on Beta 5 also. Well done, Apple, for taking the steps to get this fixed!
Solved, updated my iPhone 5s to 10.3.2 (14F89) and now it works again.
you may looking this one tutorial to record iPhone screen on your Mac.
I am experiencing the same issue. It is very important that this gets fixed since I use this daily for work to mirror my phone.
Cannot record iPhone screen(iOS 10.3) with Quicktime player
