Hi, unfortunately the .dmg seems to be corrupted. I had several different attempts repairing or open it in different software, but had no success. I would really like to use this version of the web plugin.
Thanks for the help!
EDIT: I know what's the problem
The .dmg is in APFS and not HFS+ Format and since I'm on OS X 10.11 the filesystem is not recognized. Unfortunately also 7zip under Windows, which used to open .dmg just fine, seems to be unable to handle the new FS.
Well, I don't know if APFS was chosen on purpose for the dmg, but if it was, I don't understand this decision, since HFS+ would be just fine for all Mac OS.
Also this is the first .dmg ever which I got into my hands that uses APFS instead of HFS+.