Please report any problems with the Psi4 1.1 installers here. Include OS and processor info and the actual error. Note that when running
psi4 --test that "xfail" means "expected failure" and is just fine. Only a red "failed" indicates a problem.
There have been reports of "Illegal Instruction 4" on some Macs, so please add your OS and processor info if you get that.