However , as of Mac OS X Leopard , it was no longer possible to install Mac OS X on a UFS - formatted volume .
In Apple 's Mac OS X , it was available as an alternative to HFS+ , their proprietary filesystem .
As of Mac OS X Leopard , it was no longer possible to install Mac OS X on a UFS - formatted volume .
In Apple 's Mac OS X , it was available as an alternative to HFS+ , their proprietary filesystem .