When in Minecraft's built in fullscreen, I can't switch desktops, so it isn't an issue. I just tested in on 1.8.7 and it still does it. It's worth noting that Minecraft doesn't have to be full screen. If I leave it as a window and switch desktops, the cpu still shoots up, though it doesn't reach nearly as high as it would with Minecraft fullscreen.
It's possible that it could be an OS X issue, though I have never seen it do it with any other app.
Addison Miller
When in Minecraft's built in fullscreen, I can't switch desktops, so it isn't an issue. I just tested in on 1.8.7 and it still does it. It's worth noting that Minecraft doesn't have to be full screen. If I leave it as a window and switch desktops, the cpu still shoots up, though it doesn't reach nearly as high as it would with Minecraft fullscreen.
It's possible that it could be an OS X issue, though I have never seen it do it with any other app.