Hi, Cheryl. Try DeltaGraph: http://redrocksw.com/deltagraph/mac We've been using it for a few years now - it's a useful program.
There's also KaleidaGraph (http://www.synergy.com) and Prism (http://www.graphpad.com), which I haven't tried.
To me, CricketGraph is the most complete, easy-to-use graphics program developed for the Mac, but it was developed in the 90's and cannot run natively in the Intel-based Macs. You'd need Basilisk II to run it in an Intel Mac, but that's another story.
Good luck! Ricardo -- ============================================================ Dr Ricardo A. Scrosati Associate Professor & Canada Research Chair (Marine Ecology) Saint Francis Xavier University, Department of Biology, Antigonish, Nova Scotia B2G 2W5, Canada Phone: 1-902-867-5289 - Fax: 1-902-867-2389 Webpage (with PDF papers to download): http://people.stfx.ca/rscrosat "Good judgement comes from experience. Experience comes from bad judgement." (M.R. Hay) ============================================================