When I open a launcher on my Mac, the temperature gets high as 100 degrees

When you recommended to download non Java version Minecraft Launcher, I did it, when I started the launcher, the first thing happened is that my GPU temerature was about 103 degrees, before it was normal - 30 degrees. When I started Minecraft world, it started lagging so much, that I even almost crashed my computer. I made a screenshot of the GPU status when I started the launcher. Please improve the launcher, impossible to play. I have Mac 2015, OS X Yosemite 10.10.5, No java?