On Macintosh accuracy:

• introduces video-motivated memory access delays, improving speed accuracy;
• makes the IWM's windowing logic much more like that described in its patent;
• reworks address decoding logic, yielding a small speed improvement and eliminating a small number of address space mapping errors; and
• improves 68000 behaviour re: interrupt acknowledgement, timing of interrupt decisions, and DIVS timing.

On usability:

• introduces activity indicators for the Mac floppy drives;
• provides on-screen exposition as to how to release your mouse cursor; and
• following user feedback, the Cocoa version of Clock Signal now shows the File -> Open... dialogue at launch.