Which operating system? What is published on the first page of this thread are the most recent versions.
Mac OS X should be updated today with backwards compatibility with MAC OS X 10.7.x
What is the newest version of wallet?
Well I was inactive for a week or two, and I just sent 10k USD-e and they seem lost

transaction doesn't even appear on blockchain, even though wallet is synced
My wallet version is
protocolversion" : 60002,
"walletversion" : 60000,
Windows version ofc
There was an updated wallet at some point. It's been edited into the first thread.