You don't need a passport if you have a HK Permanent ID Card (of any sort *** not necessary). You do need a passport if you are not a Permanent Resident.
More fully:
"e) The "Hong Kong Identity Card" (with symbol“*”, “***” or “R”), "Hong Kong Permanent Identity Card" or "Hong Kong Reentry Permit" holders may stay in Macau for a maximum period of one year."
(from
http://www.gov.mo/egi/Portal/rkw/pub...7ad00d226ced8b )
Obviously the "R" referred to is not the letter of you HKID number - it is the indicator of "Right to Land".