4.14 preview 1 unknown Freezing on OSX

OSX 10.11.6(15G1108)

UE 4.14 pv1 (launcher version)

  1. Open Editor and wait few second.
  2. Editor’s window doesn’t respond anything except title bar, context menu (screen’s upper).
  3. then i can close editor by title bar or context menu.
  4. But can’t do anything.

Hi sangpan,

  • Please list your Mac’s specs found here Apple menu >About This Mac>More Info> Add the information from this window (serial # not necessary)
  • Have previous versions of the engine worked? If so, what is the last working version of the editor you had installed?
  • Have you tried verifying the install: Go to UE4 Launcher (skip and let us know if you are using the Source Build)>Library>UE4.14Preview tab> Yellow Down Arror> Verify
  • If this does not fix, try removing and reinstalling

Respond with the requested information if these steps do not resolve the issue.



  • iMac (Retina 5K, 27-inch, Late 2015)
  • 3.2 GHz Intel Core i5
  • 16GB 1867 MHz DDR3
  • AMD Radeon R9 M390 2048 MB

4.13 lanucher version working fine.

Resolved after execute Verify.

UE was running abnormally until execute verify.

I take it to mean that the issue has been resolved after you verified the installation. Let me know if you need more help with this.