If it's anything like previous versions, it's likely a permissions issue - by default Mac OS doesn't let programs modify files in system folders or protected locations - unfortunately the dev doesn't follow the mac security guidelines when they do their mac build so this prevents saves from working out of the box. I got the 1.9 version working on my mac by:
1) Copying the game to the root of my user folder e.g. "Macintosh HD\users\origin2000" (a location where you shouldn't run into permissions issues, since the named user should have full access to all files)
2) Re-named it "game" (which if memory serves is also required)
and
3) Made sure the read/write properties of the game were set properly using a script I picked up years ago on F95 called "fixperm" (see attached).
4) To get savegames working --
The mac version stores it's savegame files within the app bundle itself, so you need to manually create the savegame folder in order to give the game the correct location to read/write save games to:
A) Right click (or command click) on the game, choose "show package contents"
B) Navigate to "contents \ resources \ data \ " folder and add a new folder called "StreamingAssets"
C) Within that new folder, create another new folder called "Saves" (not sure if capitalization is important, so I'd capitalize both folder names as I have shown just in case)
D) and I'd also recommend that you re-run the fix permissions script if you didn't run it in the earlier steps.
I just tried this on my machine and was able to get the game working - to save a new file, and to load an old save that I copied in from version 1.9 -- so hopefully if you follow the same steps you should be able to get it working too!
**Edit: Update - although the instructions I provided worked to load an old save file, I couldn't save new games or delete old ones -- I think there's an issue with the new build.**
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