This is because you may not have granted Recorditor Accessibility privileges in OSX preferences.
Please go to System Preferences –> Security & Privacy –> And under Accessibility/Privacy tab, click next to Recorditor icon.
You will need to click the padlock on the lower left corner and enter Admin credentials to unlock the preferences.

Please make sure Min:Secs is selected as the time base in Pro Tools main time window.

You should be able to see the RecorditorReWire plugin load up under “Instruments” category.
If you don’t see it, please make sure that you have restarted Pro Tools after installing Recorditor.
If you still can’t see it, please quit Pro Tools, and delete AAX Plugins Preferences.
This file can be found at: “~/Library/Preferences/Avid/Pro Tools/InstalledAAXPlugIns”
To access your user Library folder, in Finder menu click Go -> Library while holding down the Option key on your keyboard.
Make sure you have created an AUX track and instantiated RecorditorReWire plugin on it.