Moving to Indesign Forum
Your version of InDesign may be up to date, but your colleague is using a newer version.
At this point, there are two types of licensing, perpetual licenses that were available up to CS6 (version 8.x) and can still be purchased for CS6, and subscription licenses for Creative Cloud, which include access to CS6, CC (version 9.x) and CC 2014 (version 10) currently, and will add new versions as they are released. Since you didn't mention what version you have or tell us exactly what the error message says, I'm guessing you have CS6 and are receiving files from CC or CC2014.
If you have a subscription plan you can easily add the newer versions. If not, you should ask whomever is supplying the files to provide IDML, with the understanding that some file information may be lost and the page may not look identical.
What is your exact version?
What is the version of your mac OS?