In software archiving communities (Internet Archive, certain legacy trackers), uploaders sometimes append group names to identify the source of the crack or repack. While Adobe does not require cracking (as it uses a subscription SaaS model), older offline installers are sometimes shared with scene tags.

Warning: If the "Monter Group" tag suggests a modified executable, proceed with extreme caution (see security section below).

Large corporations, design agencies, and educational institutions often use Adobe’s Admin Console to create custom packages. An IT administrator at a hypothetical agency called "Monter Group" (or using "Monter" as a project code name) could repackage the official 28.6 update into a custom .dmg for silent deployment across 50 workstations.

Likelihood: High. If you found this on a work computer, "Monter" is likely the internal IT deployment name.

The most perplexing part of your file name is the suffix -Monter Group-. Adobe does not officially name their DMGs with arbitrary studio names. So, where does this come from?

Assuming this is a legitimate Adobe package, your Mac must meet these specs to run version 28.6:

The .dmg (Disk Image) format is native to macOS. If you have Illustrator 28.6 -Monter Group-.dmg, it is strictly a Mac installer. Windows users will find .exe or .msi equivalents.

To understand version 28.6, we must look at Adobe’s versioning timeline. Adobe Illustrator moved away from the "CS" (Creative Suite) numbering (CS3, CS4, CS5) to a "CC" (Creative Cloud) model around 2013, and eventually to a simplified "Year" model (2020, 2021, 2022, 2023, 2024).

Version 28.x represents the Illustrator 2024 release cycle.

Legitimate Adobe software is code-signed by Adobe Systems Inc. and notarized by Apple. This tells macOS the software is safe.