Update Sep 7th: I’m pleased to report that since 4.9.0 this problem is fixed.
Since upgrading to 4.8.0 I can’t run packaged Mac apps, even though the output log says the build completed successfully. I have used some of the sample projects as a comparison, e.g. the 2D side scroller blueprints project, FPS and flying (all blueprints). If I literally create a new project from any of the templates in 4.7.6 and package immediately without doing anything else I can run the packaged app without issue, but if I do the exact same thing in 4.8.0 nothing happens at all. No output, no errors.
I have run a Verify on the 4.8.0 installation but that doesn’t seem to have helped.
Happy to attach output logs or any other info needed.
I’m on OSX 10.10.3 (Yosemite). Late 2013 iMac 27".