Hybrid install fails on OSX High Sierra

Struggling to install Hybrid 3 on OSX High Sierra 10.13.6. Ilok installed fine, product authorised, but the installer of the synth itself gets to the end and says "Installation failed. The installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance"

Any ideas?! Thanks! (BTW computer is MB Pro 2018, i7, 32Gb RAM)
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