You can do that using PowerISO in 5 seconds: Open the DMG file in PowerISO, then select TOOLS menu > CONVERT. So, if you want to write a DMG image, you have to convert it to ISO first. Also, you CANNOT directly write DMG images, because they are compressed. This software does not take ZIP files, it only takes the uncompressed disk image (.iso. If this sounds like too advanced or time consuming for you, then just grab my own Mac OS 9.2.2 bootable USB stick disk image here and boot your PowerMac with it :Pīefore you begin, if your disk image is zipped or compressed, make sure to expand/uncompress it first. Once you're booted off of this already installed Mac OS 9 disk image you made, lock and mount the Mac OS 9 CD image file and launch the installer from there, which will enable you to install Mac OS 9 onto your Mac's hard drive without a hitch. You could make one yourself using an emulator (SheepShaver or QEMU) and on that disk image, you could also put various useful tools for mounting disk images, expanding archives (DiskCopy, Toast, Stuffit Expander, etc.) and while you're at it, you could also copy that Mac OS 9 CD image as is on the same disk. so to overcome this, I suggest that you boot from an already installed Mac OS 9 system folder. Some versions of Mac OS 9 install disks will refuse to boot (and/or install) from an unlocked drive (such as an USB stick) as it was supposed to be a copy protection scheme (I guess). QUICK WARNING IF YOU'RE ABOUT TO CLONE A MAC OS 9 INSTALL CD! all of them individually burned onto my old 4GB USB stick. IMG hard drive image made with SheepShaver. ISO CD image from a real Mac OS CD dumped with PowerISO and even a. TOAST CD image made with Roxio Toast under Mac OS 9, a. Using this software, I successfully booted my DV+ G3 iMac from summer 2000 from a. You can also achieve what's described in this article under Mac OS X using the Terminal. I'll demonstrate how to 'burn' various bootable Mac OS 9 CD images (but you could use this tutorial for any Mac OS version really) onto an USB stick using the free, simple and super useful HDD Raw Copy Tool under Windows. It will let you achieve this task in a matter of seconds, super easily using a normal Windows PC. If you're a collector or hobbyist and got a G3 or G4 and would like to install Mac OS 8, 9 or Mac OS X on it but that the CD/DVD drive is broken, here's a complete guide that will prove to be useful to you. PowerPC Macs such as G3's and G4's can boot off of USB sticks, even if this functionality has been buried so deep in technical details that almost nobody knew about it until nobody used G3's anymore.

How to write dmg files to usb