Apple has
announced the availability of the next version of the operating system for Macs, "macOS Sierra". It is currently available for beta testing by registered developers and is scheduled for public beta testing in July and final release in the third-quarter of 2016.
Tunnelblick users are urged to test Tunnelblick under Sierra and report problems to
devel...@tunnelblick.net without breaching Apple's NDA. That should be possible by simply describing what needs to be done in Tunnelblick to cause a problem to happen. (A hint as to what the problem is would be appreciated, too, of course.)
Tunnelblick Support for OS X 10.4, 10.5, and 10.6
When Tunnelblick for Sierra is released, we plan to discontinue security updates of deprecated Tunnelblick 3.5.9, which is the last version that runs on OS X 10.4, 10.5, and 10.6.0 - 10.6.7 and on PowerPC processors.