MacBook Pro 10.9 i7 with 16 GB RAM, plenty of free HD space Spinning wheel comes up for about 5 seconds or so during typing in body of email messages, happens a lot. Tried rebuilding the identity, tried the sudo update_dyld_shared_cache -force command This guy has only a 185 MB mailbox up in O365 but his Identity is over 10 GBs. WHy? He created an archive and a ton of subfolders. He drags and drops all his incoming messages into these folders. Is this the "wrong" way to archive or is this ok? In Windows, archiving out of an OST to a PST helps Outlook wrap it's arms around the newer and now smaller OST. WHat's the point of archiving in Outlook for Mac though? Seemingly the Identity doesn't get any smaller. I'm not seeing what archiving in 2011 achieves.