I emailed Canon about their EOS utility tonight, and received this response:
Thank you for contacting Canon product support regarding compatibility
between the software for your EOS 7D and your recently updated Mac. We
value you as a Canon customer and appreciate the opportunity to assist
While I do not have an estimated release date for an update to our EOS
Utility software at this time, I can assure you that we are working to
update the software and will release a new version soon. We appreciate
your patience in this matter.
Please let us know if we can be of any further assistance with your EOS
Thank you for choosing Canon.
Technical Support Representative
There you have it - "Soon"!
As for the EOS utility, the 2.8.1 version does work for me, but the versions released after it do not.