In short: Repairing disk permissions might restore your computer to health after an upgrade to Mavericks.
If you’ve landed here, it might be because you are looking for a solution to a problem many people have had - you upgraded to OS X Mavericks and now your computer is running slower than ever before. When I upgraded my iMac, the performance loss was considerable. Mavericks was running excruciatingly slow after the upgrade. I was already running Mavericks on one of my secondary machines - a MacBook Pro - and it seemed to be functioning pretty smoothly, but not so on the iMac. Using my computer suddenly became an painful experience.
I am happy to report, though, that I found a solution - and I hope it might work for you, too. For me, booting the computer in recover mode and repairing the disk permissions on the main boot sector did the trick. Here’s how you can do the same.
1) Restart your computer while holding down the option key.
2) Select the repair partition (usually the one on the right).
3) Select “Disk Utility” from the OS X Utilities screen and click continue.
4) Choose the main boot drive from the list on the left and then click “Repair Disk Permissions.”
5) Once the repair process completes reboot the machine.
In my case, this process worked perfectly and my iMac is in tip-top shape again. Hopefully this will work for you, too.
AWS Elastic Load Balancers communicate with EC2 instances over standard HTTP, which can cause issues when WordPress is setup to use SSL. A single line of code in wp-config.php can fix this problem.