Mac OSX 10.5 Leopard: Installing on a UFS-formatted volume.Apple,12.Juni 2012,abgerufen am 28.März 2020(englisch):„You cannot install Mac OSX Leopard on a UFS-formatted volume. In addition, you cannot upgrade older versions of Mac OSX installed on UFS-formatted volumes to Leopard. To upgrade to Leopard you need to reformat your startup volume.“