This means almost all of your computer's power will be allocated to the game. This will ease the computational load on your Mac's hardware, allowing it to run the game more smoothly. It'll let you use Windows on a Mac (remember, the recommended settings for Fortnite require a Windows OS). If you really want to up your Fortnite experience on Mac, make sure to follow some fundamental tips that help Mac games run better in general.
Step 3: Make sure you optimize Fortnite for Mac. Have forum threads at the ready in order to troubleshoot. Not all of these issues, or even a majority of them, have been formally handled by Epic (yet), so if you want to play Fortnite on Mac, know that it's a bit of a gamble.