Created DMGs don't work on Mac OS Yosemite

First of all, thanks for making create-dmg! I’m using as part of my build pipeline.

Recently I got a support call from a customer who was getting errors when trying to open the DMG. DiskImageMounter claimed that the disk image was corrupt. They were using a MacBook Pro with Mac OS Yosemite.

I was able to set up a remote connection over TeamViewer and used the shasum command in Terminal to check the integrity of the file. It matches exactly with the file on my mac yet it won’t open on their computer. I thought it must be a fluke, but they get the same error on two different laptops, both running Yosemite.

Do you know of anything that could be causing this? Are you using some new, cutting-edge DMG format or something?

[sindresorhus]

Do you know of anything that could be causing this? Are you using some new, cutting-edge DMG format or something?

Yes, from the readme:

The DMG requires macOS 10.11 or later

And no, sorry, I’m not going to change this or add an option to change it. I don’t support Yosemite in anything I do, and neither should anyone really. macOS updates are free.

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If you really have to support Yosemite, you could change this locally to UDBZ.

[whmountains]

Yes, UDBZ works fine on Yosemite.

I’m using create-dmg with my electron app. Electron provides a nice compatibility layer, and it didn’t make sense to drop Yosemite support for a small thing like DMG support. My decision would likely have been different if I were bundling a native mac app.

I wish @sindresorhus would add a command line flag to change compression format but I’m not getting my hopes up. For now I’m happy to stick with my modified version of create-dmg. “If it aint broke don’t fix it”, right?