iZotope plug-ins are not compatible with GarageBand. We strongly recommend upgrading to Logic Pro or another supported host application.
While you can insert most iZotope software on a GarageBand track, most advanced features will either cause a crash or have limited functionality.
Memberships
iZotope memberships/subscription products are unable to be activated within Garageband and will require Logic Pro, or another supported Host Application to run.