My imac is running slow after i reinstalled mac os 10.11. I change to a bigger hard drive and reinstalled the mac 0s 10.11 and did all the updates. After installing the updates it seems to run slower. when i click on programs they won't open up right away. I click on google chrome and it take a minute or two to open same thing with itunes and other stuff. Web pages load slow now. I don't know if apple updates slowed down the computer. it has a 2.66ghz cpu and 4gb of memory. thanks for the help.