UE 5.7, mac studio m3, 30fps on a new third person scene

Hi there, i bought a new mac studio m3 ultra 28cpu, 60gpu, 96go ram, screen 4k 144hz, I just installed unreal 5.7 release, create a new default third person project, and then i turn around 25 and 40 fps. How is that possible ? I tried to run real games for testing in full settings and 4k, WOW run at 120fps and League of legend at 228fps. So why an empty game turn between 25 and 35 fps.
My mac is up to date, unreal too. If someone know how to solve this problem, let me know please. I tried to found solution but i found nothing sadly. Thanks