How to check ANT+ drivers are installed on MAC mini? which library files need to configure for drivers on various MAC platform's?
I have seen the problem with MAC drivers it couldn't installed without MAC ANT+ library.
I have integrated MAC library with Customised Application but it failed to install ANT+ drivers on user system by customised application.
It could be possible your customer is using another application (e.g. Garmin Express) that is connecting to the ANT USB stick - only one application can connect to it at a time.
You may want to add some debug logging into your application to collect what specific errors are generated when attempting to connect to the USB stick from your customer's application.