OK, So I downloaded and burned the NETINST 20190127 CD, and used it to install the powerpc (32 bit) port on my Mac mini G4.
All went well as I followed the “install” (not “expert”) script. I manually entered the mirror as “ftp.ports.debian.org” and the directory as “/debian-ports/“. It accepted that and continued as expected.{1} When it got to “running tasksel”, I chose a bare minimum installation with “SSH server” and “standard system utilities” — nothing else. It had no trouble installing those tasks. When it got to trying to install grub, that failed (as expected). I chose to “continue without boot loader”. It wrapped up and ejected the CD then paused before trying to reboot. While it was paused I switched to the alt-<f2> console and did the following{2}: chroot /target mount -t sysfs none /sys apt install hfsutils yabootconfig -b /dev/sda2 ybin exit This created a rudimentary yaboot.conf file and install the yaboot bootloader. If I had switched to the alt-<f2> console earlier — say while the “installing grub failed” message was still displayed — I suspect that I would not have needed to mount the /sys filesystem. Though all the rest would still have been necessary. Then I allowed it to reboot into the installed system, which it did with no problems. let me know if you would like a tar file with the stuff from /var/log/installer… Or if there’s anything else I can do to help. Notes: {1} It would be nice (“wishlist” level) if somehow that part were automatic. For example, have it be an option on the list of available mirrors? {2} Would it be possible to have “install yaboot boot loader” be an option on the main menu — parallel to “install grub bootloader”? That would be less daunting for beginners who don’t have our level of initiation into the Debian arcana. Thanks! Rick