How to install latest Mate DE 1.14 on Ubuntu Mate 16.04?

[lah7]

The new answer is: In a few weeks!

See here:

MATE 1.14 built against GTK2 will come to a PPA for 16.04

In answer to all the requests, Yes, MATE 1.14 will be coming to a PPA for Ubuntu MATE 16.04. ️ However, it will be a GTK2 build to ensure nothing in your LTS gets broken. I’m not going to have access to a computer for just over a week, but the build is done. We’ll do some final testing before releasing, shouldn’t be more than 2 weeks.

There's been a few topics asking about MATE 1.14 for 16.04, so we'll keep track of this in one place.