Unfortunately, the Beta version of the Mac/Linux Viewer has limited functionality and more features will be added at later stages. You can see the full list of currently implemented features as well as the features that are expected to be implemented in the nearest update on this page. However, please note that the Color format and FPS limiting settings that are shown on the Color and CPU tab on Windows machines is displayed in the Quality tab in Viewer for Mac and Linux:
Unfortunately, right now there’s no direct switch to limit the CPU usage in Viewer for Mac. However, please try enabling the Enable FPS limit checkbox and sel ect the preferred FPS value fr om the list - this would act in a similar way as if you would set the CPU usage switch to the FPS value and then selected the preferred FPS value in Viewer for Windows.
I’ll additionally forward this to our development team and ask them if there will be the same CPU usage limiting switch implemented in the future updates of the Viewer for Mac/Linux.