New install of Lightroom 5.3 on Mavericks (MacOS 10.9) won't allow me to add an "Export User Preset".

I just installed the Creative Cloud version of LR on my brand new MacPro, running Mavericks. I start to create the preset, but it won't save. I had no problem with this on my iMac in LR3. It's never worked with this version.

I've checked Read and Write privileges to the entire hard drive to make sure that wasn't the issue.