Okay guys, sorry for the delayed response, but that thing called life had gotten in the way...
So I tried to start up Myth II and load into the Myth I levels, same thing happened. I get the map and the voiceover, then the animation, then it loops back to the main menu game screen.
Here is the content of the myth_log.txt file. It a bit long but here it is anyway:
2018-03-03 10:35:35
Myth II |iUniversal|p Build 434 running under MacOS 1096 (Intel) ----------------------------------------------
Loading poweruser.txt... not found.
DEBUG: Updating monolithic tag cache:
Initial count: 18
Number removed: 0
Number added: 0
New count: 18
DEBUG: Adding 14 monolithic tags:
small install
medium install
large install
international small install
international large install
Patch 1.2
Patch 1.3
Patch 1.4
Patch 1.5
GateofStormsNet
Patch 1.8 Interface
Myth II Interface (800x600)
Patch Templates
Demo Detail Textures
Scanning for software devices...
Found 1 to use
Scanning for OpenGL devices...
Found 1 to use
Intel HD Graphics 3000 OpenGL Engine | Intel Inc. | OpenGL 2.1
Warning: Unable to find cutscene 'prologue.smk'.
Running OpenGL 2.1 at 1920 x 1080, 60 Hz (VSync ON)
Starting mesh "Crow's Bridge" with 2 plugins...
Magma - The Fallen Levels v2
Patch 1.5 Unity
Using 1.8.1 gameplay...
OpenGL: Initialized with TexCacheSize=512, ErasePreviousFrame=0, MaxAnisotropy=8, MSAASamples=1, UseDepthTest=1, UseMipMaps=1, UseNPO2Textures=1, UseShaders=1, UseLightmapBlendingShader=0, UpdateCMapChunked=1, UseCMapTiles=1, UseAppleClientStorage=1
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for collection definition 'ebbf'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile definition postprocess failed on 'internal hold sparkle'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile group definition postprocess failed on 'internal hold effect'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for scenery definition 'bat4'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for scenery definition 'bat2'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for scenery definition 'bat3'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for scenery definition 'bagb'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for object definition 'bash'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile definition postprocess failed on 'barrel board'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile group definition postprocess failed on 'apple barrel explosion'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: scenery definition postprocess failed on 'apple barrel'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile group definition postprocess failed on 'potato barrel explosion'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: scenery definition postprocess failed on 'potato barrel'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile group definition postprocess failed on 'pickle barrel explosion'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: scenery definition postprocess failed on 'pickle barrel'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for sound definition 'ther'.
Error: File system Open in /1.8-dev-X/Myth2Code/shapes.c, line #1865: failed to load sequence sound TFL thrall:eruption:'ther'
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for sound definition 'ther'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile group definition postprocess failed on 'thrall myth i entrance'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: monster definition postprocess failed on 'thrall tfl'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: unit definition postprocess failed on 'thrall fodder'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for object definition 'bash'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile definition postprocess failed on 'ch00 fir'bolg bow'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile group definition postprocess failed on 'ch00 fir'bolg peices'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: monster definition postprocess failed on 'fir'bolg (flameless)'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: unit definition postprocess failed on 'fir'bolg (palace guards, left)'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for sound definition 'dwpa'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile definition postprocess failed on 'dwarf chute'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile group definition postprocess failed on 'dwarven chute'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile definition postprocess failed on 'dwarf paratrooper'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile group definition postprocess failed on 'dwarven paratrooper'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: monster definition postprocess failed on 'dwarf tfl'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: unit definition postprocess failed on 'dwarven suicide brigade'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for object definition 'bash'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile definition postprocess failed on 'ghol sack'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: projectile group definition postprocess failed on 'ghol pieces'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: monster definition postprocess failed on 'ghol tfl'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #622: unit definition postprocess failed on 'ghol eyebiter tribe'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for ambient sound definition 'amka'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for ambient sound definition 'racr'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for ambient sound definition 'amsm'.
Error: File system Open in /1.8-dev-X/Myth2Code/definitions.c, line #471: couldn't read header for local proj group definition 'chsm'.
Warning: Unable to find cutscene 'prologue.smk'.
Closing Myth.