Fortnite cannot open on my mac

Every time I try to load Fortnite on my Mac OS X El Capitan 10.11.6 it crashes and gives this report. How do I fix this? Whats wrong?

LoginId:dcf01c7c82468721c66916b17e8cafe2
EpicAccountId:49b96adce61d4bff82a8daf7addd0a45

SEGV_MAPERR at 0x3

Unknown() Address = 0x109be234b (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x109cc2806 (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x109d2267c (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x109ce9874 (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x109ba5092 (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x109ba8989 (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x10a2580bd (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x10a252ecc (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x10a24ea1d (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x10a245468 (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x10a244828 (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x10b0a6926 (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x10b097cfa (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x10b099ab5 (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x10b098f8f (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x10893745a (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x10893ce6a (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x108943637 (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x109c707b0 (filename not found) [in FortniteClient-Mac-Shipping]
Unknown() Address = 0x7fff94ffac44 (filename not found) [in Foundation]
_pthread_body Address = 0x7fff8635899d (filename not found) [in libsystem_pthread.dylib]
_pthread_body Address = 0x7fff8635891a (filename not found) [in libsystem_pthread.dylib]
thread_start Address = 0x7fff86356351 (filename not found) [in libsystem_pthread.dylib]