First off, I am new to the Mac world. But, I am quite surprised how much of a performance issue has reared, especially comparing it to my 6 year Win XP desktop. My month old, top model rMBP/16GB/1TB is starting to slow considerably. Not sure where to start looking. I am using a 4 TB Segate USB 3.0 drive for Time Machine I am using a 4 TB Lacie TB drive to store pictures and video. 200 GB's of the SSD are dedicated to Bootcamp/parallels/Windows 7 Time Machine is being run set with the defaults. I also have Crashplan running, but have exited the program to see if that makes a difference. Basically what i am finding is webpages, which used to be instant, now sometimes take quite some time to open - when the system is slowing down. Exploring my picture or time machine drive - when I click on a folder sometimes it takes 10-15 seconds to display the folder, frequently getting the beach ball. Sending a web URL using a Gmail extension in Chrome sometimes takes 10- seconds before the email screen will fill in. I've noticed using Activity Monitor, that when ever viewing web pages there are 10 or more "processes" of "Google Chrome Helper" listed. Clicking on emails (native mail) sometimes gives me sizable delays. Sometimes the actual email window is blank, even though the counter will be showing a positive number of messages. I have run Utility Disk/ Verify disk with varying results. 330 GB's is currently available of the Mac partition of 800 GB's, which I assume puts me well under the "80% rule" My Mac HD and the Lacie drives check as OK, the Time Machine failed with the following log: 2014-04-09 13:55:52 -0400: 2014-04-09 13:59:03 -0400: Verifying volume Time Machine 2014-04-09 13:59:03 -0400: Starting verification tool: 2014-04-09 13:59:35 -0400: Checking file system 2014-04-09 13:59:39 -0400: Checking Journaled HFS Plus volume. 2014-04-09 13:59:39 -0400: Checking extents overflow file. 2014-04-09 13:59:56 -0400: Checking catalog file. 2014-04-09 14:29:34 -0400: Checking multi-linked files. 2014-04-09 14:29:37 -0400: Checking catalog hierarchy. 2014-04-09 14:29:47 -0400: Checking extended attributes file. 2014-04-09 14:41:05 -0400: The volume Time Machine could not be verified completely. 2014-04-09 14:41:09 -0400: Error: This disk needs to be repaired. Click Repair Disk. 2014-04-09 14:41:09 -0400: 2014-04-09 14:41:09 -0400: Disk Utility stopped verifying Time Machine: This disk needs to be repaired. Click Repair Disk. 2014-04-09 14:41:09 -0400: 2014-04-09 14:43:26 -0400: Verify and Repair volume Time Machine 2014-04-09 14:43:26 -0400: Starting repair tool: 2014-04-09 14:43:56 -0400: Volume repair complete. 2014-04-09 14:43:56 -0400: Updating boot support partitions for the volume as required. 2014-04-09 14:43:56 -0400: Error: Live file system repair is not supported. 2014-04-09 14:43:56 -0400: 2014-04-09 14:43:56 -0400: Disk Utility stopped repairing Time Machine: Live file system repair is not supported. 2014-04-09 14:43:56 -0400: Are there any monitors that I could be running that would create a log that would show what is causing a slowdown? Using activity monitor I have found nothing that makes sense to me.