Slide Puzzle X for Mac

From NPC Unlimited:

This is NOT your father's "15 square" puzzle! With ease of use, speed, and flexible configuration, the only hard part is SOLVING it.
Progressive challenge keeps it fresh time after time.

Move a tile into the empty space, rearrange until the picture is correct.
From 3x3 - 9x9, with four levels of challenge from "Easy" to "Really Hard" This game will challenge everyone.
Use your own pictures if you like.

Featuring:

• Progressive challenge: Play over 30 puzzles increasing in difficulty.
• Pictures and/or numbers.
• Choose the number of squares ( 3x3 - 9x9 )
• Use your own pictures
• Preview window if you need a hint.
• Mouse and keyboard control
• Click once, move a whole row.
• Resize the image to fit your screen
• If you need another hint show the numbers.