Apple recently released a new line of computers using their new M1 ARM based microprocessors, also known as Apple Silicon. These processors cannot directly run applications developed for older Intel processors.
To address this issue, Apple uses an intermediary application called Rosetta that converts (on-the-fly) older Intel programs so that they can run on the new M1 processors.
Newer programs are often available as “Universal” applications meaning that they contain both Intel and ARM versions of the underlying code. This enables them to run natively (i.e, as fast as possible) on both architectures with the correct version selected automatically.
Gig Performer 4 is available as a Universal application and so can run on both Intel and ARM based Apple computers.
However, if you run Gig Performer 4 on an ARM based computer but your VST/VST3 plugins are still Intel only, Gig Performer 4 (or indeed any audio plugin host running natively) will not be able to access those plugins.
Click here to learn how to solve this problem: https://gigperformer.com/gig-performer-4-cant-find-or-use-plugins-on-the-new-mac-m1-processor/