System fails to launch after ported to Xcode 11.3 and Catalina

[LoetLuemmel]

After a couple of amendments (mostly path issues to SDL2), I could create a BAII build.

All looks good, when BAII boots System 7 up and installed extensions get listed at the bottom. Just about when the first window should appear, the application terminates.

Here you can study the terminal output:

Basilisk II V1.0 by Christian Bauer et al.
WARNING: Unknown preferences keyword 'keycodes'
WARNING: Unknown preferences keyword 'keycodefile'
WARNING: Unknown preferences keyword 'mousewheelmode'
WARNING: Unknown preferences keyword 'mousewheellines'
WARNING: Unknown preferences keyword 'dsp'
WARNING: Unknown preferences keyword 'mixer'
WARNING: Unknown preferences keyword 'ignoresegv'
Reading ROM file...
Using SDL/coreaudio audio output
Using SDL_Renderer driver: metal
VOSF acceleration is not profitable on this platform, disabling it
WARNING: RmvTime(000ecb12): Descriptor not found
Caught SIGSEGV at address 0x100000014
D0: 00000000 D1: 000000b2 D2: 0000000a D3: 00010001
D4: 05d46570 D5: 00007faa D6: eb37fe48 D7: 00007ffe
A0: 000c4114 A1: 0013e056 A2: 049c907d A3: 00000001
A4: 05d46570 A5: 00007faa A6: eb37fe98 A7: 001fc792
USP=00000000 ISP=001fc792 MSP=00000000 VBR=00000000
T=00 S=1 M=0 X=0 N=0 Z=1 V=0 C=0 IMASK=0
FP0: 0 FP1: 0 FP2: 0 FP3: 0
FP4: 0 FP5: 0 FP6: 0 FP7: 0
N=0 Z=0 I=0 NAN=0
0013de1e: 712f 4e74 0010 0000 0008 EMULOP.L #$0000002f
next PC: 0013de20

Any suggestion or idea how I could get this fixed?
Maybe also the keycode file?

Thanks for your great work & Best,
-Pete