Does the sentence "Used even by Apple for A/UX and MkLinux, this technique is no longer necessary since the introduction of Open Firmware-based PCI Macs, though it was formerly used for convenience on many Old World ROM systems due to bugs in the firmware implementation.[citation needed]" answer the question "What was introduced that made using Mac OS alternative operating systems easier?"

Select from:
(a). yes;
(b). no;
(a).