Groom Alembic invisible

Hi, i’ve try to manage with groom hair. When i import my alembic file in UE4.26 the alembic is invisible in all the viewers.
I’m on mac 10.14

I have same problem on Mac 11.4 importing from alembic file exported from Blender. tried messing with settings now every time i try importing alembic file it crashes UE.