Epson Stylus COLOR 600 User Manual page 22

Note:
The amount of available memory varies according to the number
and kind of applications that are open. To see how much memory
is available, choose About This Macintosh from the Apple menu
and refer to the memory size (listed in kilobytes) under "Largest
Unused Block" (1,024K=1MB).
The memory requirements above are for printing on Letter size
paper. These requirements may vary depending on the size of the
paper, the type of application you are using, and the complexity of
the document you want to print.
You need an additional 1MB of available memory when
background printing is turned on.
In addition to these system and memory requirements, you
also need 6MB of free hard disk space to install your printer
software. To print, you need extra hard disk space amounting
to about double the size of the file you want to print.
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Getting to Know Your Printer