We have successfully used:
Tops Spool - Remember that you will need 2 Mb of RAM to run TOPS successfully.
Print Monitor - The MultiFinder spooler from Apple does work fine but:
1. If you print a PICT file with Print Monitor under low memory conditions, the document will print incorrectly or will not print at all. For example, scanned (bitmap) objects may not print, or the bitmap will print with the right and left halves reversed.
2. If you print to a LaserWriter with PrintMonitor on and later plot using MacPlot 1.1, you won't be able to print to your LaserWriter using Background Printing. MacPlot 1.2 update prevents this problem.