Metal and OpenGL Support on OSX
Updated June 19, 2019
For the last 6 years, ProSelect has used your Mac's OpenGL libraries to directly access the graphics hardware on your computer when playing slideshows. OpenGL is used to make slideshows run smoother on slower hardware and also allow ProSelect to use GPU intensive effects like the Ken Burns effect. You can still play simple slideshows in ProSelect without OpenGL support turned on.
To ensure ProSelect will continue to work well on Macs into the future, we have invested in upgrading the slideshow in the ProSelect 2019r2 release (coming in July 2019) to use "Metal" which is Apple's recommended replacement for OpenGL.
Does my computer support Metal?
To use Metal, your computer's GPU must support Metal (see this Apple article: Mac computers that support Metal) and you must be running OSX 10.11 or later on that machine.
If your computer supports Metal and you are using OSX 10.11 to 10.13 then, in ProSelect 2019r2, you can choose to use either Metal or OpenGL in ProSelect's Preferences -> Slideshow -> Slideshow Settings -> Performance. If you are using OSX 10.14 (Mojave) or newer, you can only select and use Metal.
The About ProSelect window shows whether OpenGL and/or Metal is available on your computer and which of these is currently selected for use when playing the Slideshow.
Upgrading to ProSelect 2019r2
As usual, if you are on a lease or your PLUS is current at the time of the 2019r2 release, then this release will be a free upgrade for you.
KnowledgeBase Article: Metal and OpenGL Support on OSX