Hi, I'm currently experiencing this issue. I'm using the latest version for Macosx and i'm on Yosemite beta. I have a folder where it downloads torrents with transmission app. This folder then syncs with a rasppi to get the torrents. Transmission.app on mac uses the .part extension while downloading. But after it is completed i see 2 files on my folder and the one is with .!sync extension. Could you help me with what is wrong?