I was having “Media Pending” issues with Sony raw footage in Premiere on my mac. I did some digging and it appears that in the last update to Premiere Pro CC (version 7.2) Adobe included native support for Sony raw at 4K, 2K and HFR. If you are running Premiere CC and you still have the Sony Raw Plug-In installed it makes Premiere unresponsive and will result in a lot of “Media Pending” messages when you try to work with Raw footage. After removing the Sony raw importer plug-in all my media pending issues went away and I can now use 2K HFR footage in Premiere CC.
To uninstall the plugin on a Mac (called “ImporterSonyRawBundle”) go to “Applications” then “Adobe Premiere Pro CC” and then right click on the “Adobe Premiere Pro CC” app file and select “Show Package Contents” then open “Content” and then “Plug-ins” you should find the file you need to trash.