This is version 3.0 of MacSokoban, a significant update over the previous 2.1, both in appearance and features. The best news are the multi-step undo and auto-save.
This is just a note file for helping you if you have problems. The full docs is inside the game.
WHERE DO I START?
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Start by launching MacSokoban. If you never played the game before, select "Add a new player" from the Player menu. If you have played MacSokoban before, and want to continue where you left off, quit MacSokoban again, and use the MacSokoban Score Mover to move your old score to the file "MacSokoban prefs" (in the Preference folder).
IF IT DOESN'T WORK
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Does MacSokoban fail immediately when it loads? The most likely cause is lack of memory. Try switching to 256 colors (or less) or increase the amount of memory assigned for MacSokoban in the "Get info" box in the Finder.
Does it fail when it tries to play sounds? Try turning sound off. This can also be caused by accelerator boards.