Have you tried using rEFInd for dual or triple-booting? http://www.rodsbooks.com/refind/index.html
I use it to dual-boot macOS and OpenBSD on multiple systems. The order I follow during upgrades or installs: 1) Install or upgrade macOS first because it will overwrite rEFInd if present 2) Boot into macOS Recovery Mode and install rEFInd 3) Boot OpenBSD installation media using rEFInd and perform install or upgrade 4) Reboot and OpenBSD should be selectable in rEFInd (you can customize to make it have an icon, etc. see rEFInd docs.) That's basically it at a high level. I won't go into detail about disk partitions because that's a thoroughly documented topic. On Thu, Oct 19, 2017 at 10:16 AM, Tuyosi T <nakajin.fu...@gmail.com> wrote: > sorry correction > > (wrong) > any way the previous openbsd is 6.1 . > i use legacy PC and CD(install62.fs ) and install OpenBSD area . > [ don’t touch msdos aea (wd0i)] > > (right) > any way the previous openbsd is 6.1 . > i use legacy PC and CD(install62.iso ) and install OpenBSD area . > [ don’t touch msdos aea (wd0i)] > > > and the interesting is the following > > http://blog.goo.ne.jp/kazuhirospd/e/a5cc783017c1ff2a699fce129fc72921 > says that > ------------ > The screen got dark, and SSD began to access . > What began? > I was watching the display ..., > scared out of one's wits . > It came out on the screen with a light blue Windows flag. > It is the start screen of Windows 8.1. > By the way, this SSD was what I used on the main PC until this time. > i thought it stopped with an error on the way . > but it washed up as it was. > Windows was running natively on MacPRO ! > MacOSX could not be installed with my all efforts. > but MacPRO run Windows 8.1 with no problem . > what a sarcasm it was ! > ----------- > but this is not the case for openbsd . > > > and > https://everymac.com/mac-answers/snow-leopard-mac-os-x-faq/mac-os-x-snow-leopard-64-bit-macs-64-bit-efi-boot-in-64-bit-mode.html > says that > ---------- > Intel Core 2 Duo and Xeon processors are 64-bit. However, based on reader > reports received, as well as hands-on observation, it is believed that all > Macs with 64-bit processors released in 2006 only have a 32-bit EFI, and > consequently, only are capable of booting in 32-bit mode. This is of > particular disappointment to owners of the first Mac Pro, which despite > having a powerful 64-bit processor no doubt has had its "working life" cut > short by a 32-bit EFI. > --------- > > > --- > regards
