I have not been able to sync reliably even once with the latest version (OS X). This software was stable and reliable before the latest update. I have seen all of the problems reported in this thread and others: Out of Sync No Peers I tried wiping one of the two macs I sync and having it do a full sync overnight and it didn't work either. BTSync is completely broken. I don't have time to troubleshoot anymore. I'm uninstalling it. I'd rather just use rsync and cron at this point, I know it works. I know this is beta software but people use it with their valuable personal data. One thing BTSync should do reliably is sync files between computers. I can live with the lackluster UI and all other kinds of shortcomings but when the core functionality breaks I'm done with it. I dropped DropBox because I don't trust them. I tried SpiderOak and dropped it because it's a pile of crap and I don't trust them. Going back to standard Unix tools. None of these projects work as reliably. Another plus: no crazy EULA. I read the last one that came with BTSync and it scares me to have to agree with all of that lawyer bullshit just to get files synced across two machines. I might overlook that out of a desire for convenience if the software it came with actually worked.
