After discussing with the fine folks on #openbsd [freenode], we've come to the conclusion that either my mac [Dual 1Gzh G4 Quicksilver] is acting strange, or there is a problem with fdisk or there needs to be a short explaination added to the INSTALL.macppc file.
Here's the situation: This machine works great with OSX. It works great with Debian, NetBSD or FreeBSD as an only OS [not dualbooted or anything]. When I attempted to install OpenBSD using following INSTALL.macppc I ran into a snag. According to that doc: "For stand-alone (No Mac OS installed) or dedicated disks, the MBR installation method should be chosen and no additional prep is necessary." Unfortunately, while the geometry appears correct [and shows 76G disk size], it will only let me create up to 8G of partitions [slices?] in disklabel. [after the install automatically creates the partitions using fdisk]. And when I check in fdisk it again shows the geometry correctly, with a size of 76G, but when I edit or create an OpenBSD partition using either CHS or LBA it only says it is 8G. So after trying everything we could think of [wiping table with dd, repartitioning in Debian etc], I tried to use the HFS method [pdisk]. This worked fine and it was able to see the entire disk. So I think one of the following is most likely true: A) Something's wrong with my Mac. I don't think so though since other BSD's and Linux all work just fine. B) Something is wrong [bug] with the 3.9 version of fdisk on macppc. C) fdisk is working as expected and the INSTALL.macppc documentation needs to be edited to include a note mentioning that the MBR/fdisk method doesn't actually work with >8G drives [at least on a dualg4 quicksilver] D) I'm a complete moron and I'm missing some blatantly obvious piece of information. So is everyone on #openbsd. :) So if anyone can shed some light on this situation it would be greatly appreciated. Thanks in advance, Doubletwist aka Jim McD.