Smaart v9.1.6 is not compatible with macOS High Sierra (10.13)
Due to a compatibility change in third-party vendor code, versions of Smaart from 9.1.6 forward are no longer compatible with macOS High Sierra (10.13). We apologize for the inconvenience; we were not aware of the compatibility change prior to rolling out the update and we have adjusted our deployment process to ensure that this does not happen again.
Please upgrade to macOS 10.14 (Mojave) or newer if you plan to continue updating Smaart v9. If this is not possible, please contact support@rationalacoustics.com for other solutions.