2 ms·I just found out that Activity Monitor doesn't show GPU activity. :(by e40 4y agoI just found out that Activity Monitor doesn't show GPU activity. :(anderiv 4y agoPerhaps you just missed it. It appears as a column on the CPU tab.e40 4y agoI guess I meant the Dock icon doesn't show GPU's, only CPU history. But, I didn't know about the feature. I just tried it and it went to 98% while running SD.