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Can't install Unreal Engine 4.6.1 on OS X Yosemite

I recently subscribed to the Unreal Engine and tried to install Unreal Engine 4.6.1 using the Unreal Engine Launcher on OS X Yosemite.

It's always the same: I click on Add Engine, choose 4.6.1, the download starts and then after ~20-30% the Unreal Engine Launcher becomes unavailable and I have to force quit it to start over.

I tried to restart my Mac, I tried to restart the Unreal Engine Launcher and I removed it completely (including caches and logs) and reinstalled it, but no luck.

In the logs there's always this error:

 [2015.01.03-22.13.44:510][  0]LogJson:Error: Json Value of type 'Null' used as a 'Object'.
 [2015.01.03-22.13.44:512][  0]LogJson:Error: Json Value of type 'Null' used as a 'Object'.
 [2015.01.03-22.13.44:516][  0]LogJson:Error: Json Value of type 'Null' used as a 'Object'.
 [2015.01.03-22.13.50:167][  0]LogMac: === Critical error: ===
 SIGSEGV: invalid attempt to access memory at address 0x0
 
 [2015.01.03-22.13.50:168][  0]LogMac: _ZN17FSlateApplication21ProcessMouseMoveEventER13FPointerEvent Address = 0x9902295  (filename not found) [in UnrealEngineLauncher-Mac-Shipping]
 _ZN17FSlateApplication19SynthesizeMouseMoveEv Address = 0x9902138  (filename not found) [in UnrealEngineLauncher-Mac-Shipping]
 _ZN17FSlateApplication4TickEv Address = 0x98f6c7b  (filename not found) [in UnrealEngineLauncher-Mac-Shipping]
 _ZN12FApplication3RunEv Address = 0x941fe61  (filename not found) [in UnrealEngineLauncher-Mac-Shipping]
 _Z24UnrealEngineLauncherMainRK10TSharedRefI12FApplicationLN7ESPMode4TypeE0EE Address = 0x94223a3  (filename not found) [in UnrealEngineLauncher-Mac-Shipping]
 _Z14RunApplicationv Address = 0x94224b2  (filename not found) [in UnrealEngineLauncher-Mac-Shipping]
 -[UE4AppDelegate runGameThread:] Address = 0x9422b12  (filename not found) [in UnrealEngineLauncher-Mac-Shipping]
 -[FCocoaGameThread main] Address = 0x94b99e6  (filename not found) [in UnrealEngineLauncher-Mac-Shipping]
 __NSThread__main__ Address = 0x85666b7a (filename not found) [in Foundation]
 _pthread_body Address = 0x8a4e22fc (filename not found) [in libsystem_pthread.dylib]
 _pthread_body Address = 0x8a4e2279 (filename not found) [in libsystem_pthread.dylib]
 thread_start Address = 0x8a4e04b1 (filename not found) [in libsystem_pthread.dylib]
Product Version: Not Selected
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asked Jan 03 '15 at 10:34 PM in Installation & Setup

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einfallstoll
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If I don't move the mouse over the window the Unreal Engine 4.6.1 will download and install as expected. The log shows there must be a bug with the mouse moving event.

 _ZN17FSlateApplication21ProcessMouseMoveEventER13FPointerEvent

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answered Jan 04 '15 at 12:06 AM

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einfallstoll
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