UE4 editor in play mode crashed computer

Was that the first time you ever used and played in editor?

OSX 10.9.5
i5, 16GB
Radeon 6770M, 512MB

When I was running the default 3rd person shooter template which had no modifications yet, I pressed play and began to move around. Within a few seconds, the computer shut off as if the power cord had been pulled. That’s never happened to my iMac before and the only time I’ve ever seen this happen was when I was toying with threading code under windows several years ago.

Unfortunately due to the nature of the crash there is no debug info available.

EDIT: After thinking of this I believe what I wrote above may be a red-herring. It’s possible that I was actually running the 1st person shooter C++ template using a build made from the GIT-hub source.(I was trying a lot of things within a short period of time :slight_smile: )

Hi marcClintDion,

Please provide more information about your Mac’s specs. You can find this in the Apple menu >About This Mac>More Info> Add the information from this window (serial # not necessary).

We also need the following information from the “System Report:” Apple menu >About This Mac>More Info> System Report>Hardware (All information listed in the “Hardware Overview.”) You can cut and paste this information or provide screen shots, whichever is more convenient.

Also, even though there was no Crash Reporter Screen, there still may have been crash logs generated which you can find here:

The UE4.log (Located: ~/Library/Logs/Unreal Engine/Editor/)
The ProjectName.log (Located: ~/Library/Logs/Unreal Engine/ProjectNameEditor/)

I realize this is a lot to ask, but we use this information to isolate these types of bugs to make the Mac experience comparable to the Windows experience.


Here’s the extra info. I also included a couple pList files that I think the OS may have logged in Library/Application Support/crashReports/Unreal Engine

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Hi marcClintDion,

Thanks for taking the time to supply all requested information. I have used this to generate the following bug report [UE-6539]. If this results in any fixes to the engine, an update will be added to this post.

I noticed that you are running 10.9.5. While this may not be the cause of the crash, I can tell you that a number of improvements have been made in UE4.6 that take advantage of updates in OS X 10.10. You may consider upgrading to see if that resolves some of the issues you are experiencing.

It looks like this could have been a kernel panic, for which the details of the cause are captured by the OS, not our logs. There may be more information in your system.log which can be found via the sidebar of the Console.app application in /Applications/Utilities.

No, you need to access the OS X system.log, which is located at: /private/var/log/system.log on my machine when booted into OS X. You can access it via OS X’s Console application if you boot into OS X. Looking inside the Console.app application bundle from Windows will not reveal anything useful, since that’s just static data for the Console application.

I had a look around but see nothing that looks obvious so far as info you could use. I’ve uploaded a screen capture of the directory structure that I think you are referring to.

Here’s the system log for that day.

I don’t see the attachment, I’ll try again. It’s an invalid file type. Converting to .txt

Alright, I need a break, I hit enter without adding it. Sorry for the mess. link text

We have a winner - the kernel panic report, which will tell us what went wrong is in: /Library/Logs/DiagnosticReports/Kernel_2014-12-05-213723_Marcs-iMac.panic

The underlying fault was an unrecoverable memory error in the memory pool for the GPU driver while executing the WindowServer process. That means it may have been something to do with UE4, but there’s also the possibility that it is unrelated. I’ve added all the details to our internal database as part of UE-6539 for further investigation. Yosemite (10.10) has a number of important OpenGL improvements that will improve performance in UE4 so if possible we recommend that you upgrade, even if it doesn’t directly address this issue.

Here’s the kernel panic report.
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I’ll upgrade. Thanks for the feedback.

I’ve updated the original post with something that may be important.