[BScout]

Originally Posted by jAZZbASS01

I have also got this problem, and yes I am running mac 10.10.5, but the problem started with Protools 2018.1, prior to this it was fine, and as I have not changed anything it must be something that was changed in 2018.1 - 2018.4

Yes. Still not supported.
And Yes there was a major change for graphics and Avid posted it in their readme that specifically older OS versions would not be supported. If you would like to know why: it is because Apple has changed their GUI framework (API) to a system called METAL. And now Pro Tools takes advantage of the optimised 3D graphics by using METAL -- slowly changing things over since 12.8.2. Quartz/Core OpenGL was the API before up to Yosemite. Metal was El Capitan and Metal2 is High Sierra.

http://avid.force.com/pkb/articles/e...tibility-Chart

I don't get why people claim "it's a problem" when it is specifically stated not to use it on a certain OS. At that point, it's up to the user to make the wrong or right decision.