Soundtheory has announced the release of Gullfoss for Mac v1.2.0.
The new version significantly improves computational performance. You should expect to see a 100% increase in CPU performance, resulting in double the number of instances of Gullfoss running at the same time while taking up the same amount of system resources.
Additionally, they have added support for higher sampling rates up to 192 kHz. Please note that CPU load scales linearly with sampling rate.