I am using Yosimite on a MacBook and am unable to access the Equation Editor. I have updated to the latest Java. When you select the equation editor it closes Inspire.
Please ensure that your ActivInspire software is at the up-to-date version 2.4 Software (which you can download from here on our Support Page) and that the latest version of Java has also been obtained from Java.com.
You may also need to download an OS X-specific update for Java that Inspire uses for some of its components from this Article on Apple’s Support Page.
If the same behavior presents after applying those updates, please also see if this same behavior occurs while logged into the computer with a different user account or a newly-created admin user.
Please let us know if we can assist further with this issue.
(Support Case 00619556)