Hello to all I am a photographer who shoots weddings and events in RAW and HDR images for a gallery. I own a late 2009 iMac with 4 GB of RAM and process my images in Photoshop CS5. I have been given conflicting views by Apple sales staff so would like the community to answer a question for me. JPEG files are processed easily on my iMac, RAW files slow it down and HDR (file sizes of 200mb and more) cause it to throw a wobbly. I have used activity monitor and it shows RAM usage up to 3.94GB. Processor usage at up to 190%. I am told this is OK for a duo core. (The screen updates when processor usage drops below 100%). A member of Apple staff advised more RAM will solve the problem. Another advised I would be wasting my money and should wait until I can afford a Mac Pro (bit of a wait ha ha). Can anyone advise, based on experience, whether an extra 4 GB of RAM is the way to go or whether I should save my money towards a Mac Pro. Thanks for your advice.