Ok, illegal instruction 4 victims, try out the following.
conda create -n p4env psi4 sse41 python=3.6 -c psi4/label/dev -c psi4
source activate p4env
python -c "import psi4; psi4.test()"
Only py36 at the moment. No Psi4conda installer at the moment. Please report back success or failure. If the latter, then also report result of sysctl machdep.cpu | grep features.