In the last three days, while trying to unzip downloaded files, my iMac has sent a message which said it could not complete the unzipping because there was not enough disc space (and once, I think it said not enough memory.) I'm using OS X, version 10.8.5. (I've avoided updating to Maverick because of cautionary comments from some people who did upgrade; advice on this would be appreciated, too.) Checking the disc indicates that about 75% of the space is free. I thought I knew that disc space and memory (RAM?) are two different things, so getting both messages is confusing.
DH has tried to solve the issue, but he's a PC person, to the core. He's convinced the problem is all the memory used by PSE; I think he believes I should just get rid of it - which rather defeats the purpose of downloading SG supplies.
I try to make sure that only the applications needed are open at any one time. I store supplies and completed pages on an EHD, to keep more space open on the main HD.
I'm sure I've overlooked something. Any ideas, suggestions, or diagnoses would be very welcome!