Install the application you found and check if it can read JDR file.

If you don't know the application which can open JDR file then try to search for 'JDR viewer', 'application to open JDR file' or 'read JDR file' queries in the online search engine you like.If you know the Mac OS application which can work as JDR file opener you can choose the 'Choose Application.' option in the error box to associate the file extension and open JDR file in it.If a JDR file is not opened in a Mac OS application and you instead get a 'There is no application set to open the file' error message you can click on 'Search App Store' in the error dialog and Mac OS will show you applications compatible with JDR file.Find a JDR file in question in Mac OS Finder and double click on it to launch the corresponding application.Install the application you found and check if it can open JDR file.If you don't know the application which function as JDR file opener then try to search online for 'JDR viewer', 'application to open JDR file' or 'open JDR file' queries in the search engine you like.If you know the application which can open JDR file then run it and see if there is a File->Open main menu option in the application.If a JDR file is not opened in an application and you instead get a 'Windows can't open a file' error message you should try looking for an application which can open the file in question.Find a JDR file in question in Windows OS File Explorer and double click on it to launch the corresponding application.

Iroad viewer mac