Unreal Tournament 4 wont start (iMac 27" 6770m - MAC)

Hi together,

i hope u can help me. When not, then sorry for disturbing!
I installed the Epic Games Launcher and wanted to start Unreal Tournament. But i get always this failure:

oginId:f3d70413974c5029cf3929af5c7a9b7e
EpicAccountId:e8906305d10e44f5b6f1282976aaadbf

SEGV_MAPERR at 0x3

FGenericPlatformMisc::RaiseException(unsigned
int) Address = 0x103bcd2cb (filename
not found) [in
UE4-Core-Mac-Shipping.dylib]
FOutputDeviceMacError::Serialize(wchar_t
const*, ELogVerbosity::Type, FName
const&) Address = 0x103ce6aff
(filename not found) [in
UE4-Core-Mac-Shipping.dylib]
FOutputDevice::Logf(wchar_t const*,
…) Address = 0x103d8944c (filename
not found) [in
UE4-Core-Mac-Shipping.dylib]
FDebug::AssertFailed(char const*, char
const*, int, wchar_t const*, …)
Address = 0x103d2d4db (filename not
found) [in
UE4-Core-Mac-Shipping.dylib]
LoadPhysXModules() Address =
0x105056ba3 (filename not found) [in
UE4-Engine-Mac-Shipping.dylib]
InitGamePhys() Address = 0x10503aee9
(filename not found) [in
UE4-Engine-Mac-Shipping.dylib]
FEngineLoop::PreInit(wchar_t const*)
Address = 0x103b1d9fb (filename not
found) [in UE4-Mac-Shipping]
GuardedMain(wchar_t const*) Address =
0x103b2387d (filename not found) [in
UE4-Mac-Shipping]
-[UE4AppDelegate runGameThread:] Address = 0x103b2ace7 (filename not
found) [in UE4-Mac-Shipping]
-[FCocoaGameThread main] Address = 0x103c93f39 (filename not found) [in
UE4-Core-Mac-Shipping.dylib] Unknown()
Address = 0x7fff32dfd1f8 (filename not
found) [in Foundation]
_pthread_body Address = 0x7fff58e82661 (filename not found) [in
libsystem_pthread.dylib]
_pthread_body Address = 0x7fff58e8250d (filename not found) [in
libsystem_pthread.dylib] thread_start
Address = 0x7fff58e81bf9 (filename not
found) [in libsystem_pthread.dylib]

I reinstalled the game about 3 or 4 times, without solution :frowning:

My system:
iMac 27
16 GB RAM
128 SSD APFS
ATI 6770M
High Sierra 10.13.5

Thank you so much in forward.