68kMLA Classic Interface

Just to be clear, an ISO file isn't a PC format. It is a CD structure dumped to a file. The Toast image format is fundamentally an ISO file.

Genuine truth as a person who doesn't use modern macs... What on earth is a .cdr? I'm not aware of that being a period correct extension (I mean, no extension is).

But, just to be clear, iso is good 🙂 you can open them in toast and several other programs. There is even System 6 software for isos.

@ymk Yes, you're correct, I was arguing in support of your use case. The problem I have with Zip is that people use it in situations where the file needs to be unpacked on the target system, which is difficult to do successfully pre-OS X.

There are a few times that something is "stealth" placed in a .zip inside another archive that I can't get open after I copy it over the network to, say, my SE 😛

To my knowledge, a .cdr is what apple calls a "DVD/CD Master" image. They are made with Disk Utility on any macOS/OS X based system. Essentially an ISO but the Mac version made by Disk Utility. They copy everything, so you can make copies of, say, a System 7.5 install CD and burn a copy that will start a Mac.

Note: Do not do this. Disk Utility does not make proper bootable images of MacOS CDs... It ignores the Apple Driver partition.

This is why imaging older CDs should be done using Astarte Toast CD-Copy 2.x rather than Disk Utility (or other tools) on a Mac > OS 9. I’ve tried explaining this for years and people still don’t understand.

Lots of iso and cdr images on various sites that are Mac OS 7.1 and higher that are unbootable. It makes new users hate the Mac because they download and burn and nothing works and they give up. I’ve coached many on Reddit about this.

Additionally, something like ImgBurn for Windows might work, but I’ve never tried or verified it myself.

A few months ago Action Retro did a video on Rhapsody and found the ISO files aren’t bootable and went about “fixing” them and re-uploading them. Likely the extractions were improperly done and the boot partition was lost in the process.

I’ve personally cleaned up so many disk images and ISOs on Macintosh Garden that I grew tired of fixing them. To top it off, I get nasty comments from the original uploaders questioning why I was messing with their files, which didn’t work. Trying to explain that the files didn’t work went on deaf ears and offenses were taken. “Don’t touch my stuff!”

I won’t touch your stuff if you’d archive and upload it properly.

/rant

having the option to ignore empty space and compress the file was really nice.

Toast is unnecessary IMO, just use dd.

dd is always a good answer.

Unless it's your report card. 🙁

Note: Do not do this. Disk Utility does not make proper bootable images of MacOS CDs... It ignores the Apple Driver partition.

This is why imaging older CDs should be done using Astarte Toast CD-Copy 2.x rather than Disk Utility (or other tools) on a Mac > OS 9. I’ve tried explaining this for years and people still don’t understand.

This is why imaging older CDs should be done using Astarte Toast CD-Copy 2.x rather than Disk Utility (or other tools) on a Mac > OS 9. I’ve tried explaining this for years and people still don’t understand.

Never had an issue. I've made Mac OS 7.6 and 8.1 discs in this manner in recent memory, and they all start period hardware without issue. The trick is that you have to make an image of the device, and not the disk. See the difference: first you can see the selection of the partition, and in the second you can see the selection of the entire disc itself. If you make an image of the entire disc, it works just fine.

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