I'd like to point a problem for OSX, the zip archive provided in the original IVAN site aren't unzip well by the default tool with older OSX (a version of unstuffit). With this tool Exe files are broken with the ivan archives.

One solution is perhaps to update this tool yourself or download another tool to do the job. Another solution is to use OSX 10.5.x because it includes its own archive tool.

If you are using OSX 10.5.x you could have some problem anyway because you have an installed unstuffit version not working well with ivan archives and when you double click or unzip from your internet browser it's this tool that will be used.

To avoid this problem under OSX 10.5.x take care to select the zip file in the finder then with the context menu (right click) select the system archive tool to unzip ivan zip files without to broke exe files.

Ok thanks, some times before I got bite by a spider and poisoned but it didn't last long and I didn't remember bleeding (but I remember the poisoned state).

In Ultima Underworld, I got poisoned few times but it was ok and once I saw it was bad then I start eating every stuff I had and found one that cure poison. I highly doubt it's hazard, just good design.

Anyway ok and I admit it was funny to see the dog eat a kobold corpse and sleep, nice hint design.

I get hurt by a spider once and never stop bleeding and died. And you find that fun? Ok wrong question, what could I have done?

For running the game on MacOSX it seems there's a promising solution that I'm starting to use:
DOSBox which is a DOS emulator with versions on OSX + DOS IVAN 0.50

At this point it is working like a charm but I haven't yet played a lot and had few trouble to find where are the keys to use on the keyboard.

I don't use DOSBox directly but through DBGL (DosBOX Game Launcher), a DOSBox frontend. It has also a nice OSX package easy to install and it includes DOSBox.

For mention the setup I'm using through DBGL:

DosBOX Game Launcher 0.60 and it includes DOSBox 0.72
Display :
- output : opengl
- frameskip : 0 (try 1 or more if you feel something slow)
- scaler : advinterp2x (not all scalers works perfectly for all games, but it worth try a few to eventually get a better look)
- fullscreen : off (on is working nicely but I prefer window mode)
- Double buffering : on
- Window resolution : original
- Aspect correction : off

Machine :
- machine : vga
- core : auto
- cycles : max

Memory :
- size : 63
- XMS : on
- EMS : on
- UMB : true
- Loadfix : off

Audio :
I don't have any audio in the game but that's how I like it.

I/O :
Keyboard : I have a mapper file and a layout the usually is working ok for my need but with a rogue like using much more keys, perhaps I should search something else. I can't provide a general solution, see DOSBox forums/doc for help about this.

Mouting :
Read the DBGL help for this.

I hope this will help. For any trouble DOSBox forums are great, and read the doc and the FAQ helps solve many solutions.

EDIT: I also got a strange problem with DOS IVAN 0.5, the first time I got it there was no clear Ivan file to run, it seems the uncompress had once some problem. I tried a second time and this time got all files nice including a good IVAN exe file.