I have a 7 yr old IMac. Its specs are OSX Version 10.9.5, Processor 2.4GHZ, Core 2 Duo, Memory 4GB 667 MHRZ DDR 2 SDRAM. I use it mostly for emails, music, pictures on IPhoto, and Facebook, and a little bit of word processing on Word or Pages. No Gaming of any type. The last few months it has gotten slower & slower. Today I had to click on the email Icon on the dock 3 or 4 times before email would even load. Other times if click on the X in the upper left to close an application it seems like it takes forever to close that program. What program can I get to clean up any crap that may be causing this slowdown? I am assuming that junk files are causing this. Any suggestion?