As users have previously reported, I am having problems with the connection of my genuine Garmin ANT+ dongle to Garmin Express on a Macbook Air running OSX 10.11 (15A243d).
I appreciate that El Capitan is a beta OS release; however it will be a final release in the near future and I would like to know why Garmin have not introduced support for the OS in the latest release of the Mac Garmin Express application (4.1.5.0).
I have also reported the issue to Apple.