My MacBook Pro is a 2009 model, 2.53 GHz Intel Core 2 Duo, 8 GB 1067 MHz DDR3, with a 250 GB HHD. I upgraded the HHD to 500 GB. I used SuperDuper to clone the drive making it bootable and a startup drive. After doing that, I get the pinwheel on everything, Firefox, Terminal, Activity Monitor, Safari, Mail, Outlook, Word, Excel, eveything. If I put the original 250 GB HHD back in, everything works without the pinwheel. Something is different and wrong to cause this. Any suggestions?