Color StyleWriter 4000 Series Version 1.1 Update is a single file: a serial printer driver to be used when your computer is connected directly to the Color StyleWriter 4100 or 4500 printer using the serial cable that came with the printer. This update fixes communication problems in which documents fail to print with messages such as "The printer is not responding" or "Sorry, a system error occurred (-23)." This update also improves printing behavior in some low memory situations. If your printer is connected to a Power Macintosh G3 computer using the serial cable, or you experience these problems frequently, you should install the update. If your Color StyleWriter is connected to your computer via a LocalTalk network, you do not need to install the update.