I have an old (2008) macbook pro, which I think is ok hardware wise. I am 99% sure I have previously successfully installed NetBSD on this, but in the meantime I had OS X. I tried to install netbsd-7 amd64 from an iso made in April. I know that's old, but it's the CD I had handy. Everything was basically ok, but the system won't boot. Booting from CD, I see there is a gpt label, and one netbsd partition at 1024. Presumably it has a disklbale and the / swap /usr that I tried to make. The PMBR is "not bootable; bad magic number" per fdisk. fdisk -i says it will destroy the GPT partition if I use it (which doesn't make sense; updating the boot code shouldn't trash the partition table). gpt biosboot runs, but doesn't fix the no checksum complaint. I don't know if the disk had a GPT label on it before I tried to install. I dimly remember people saying that you have to fdisk first and then convert to gpt to get working boot blocks. I'll poke around a bit and see if I can understand what's going on.
Attachment:
pgp4_BGvfwULm.pgp
Description: PGP signature