To replace an evaluation key code with a permanent license key you purchased, complete the following steps:

Note: This option applies to Rhino 5.0.1 for Mac and newer.

When you start a Rhino 5 for Mac that is using an evaluation license key, you will see this dialog:

1. Click the Enter a license button
2. 
3. Enter you name, organization, license key, and press Done
4. Follow the instructions to register and validate your license

Note: This option will work for all builds of Rhino for Mac and can be used to change
any license key.

1. Start Rhino for Mac
2. Click on the Rhino pull-down menu
3. Click on Preferences
4. Click on the Licenses tool
5. Click on the Change your license key button
6. Enter your key code
7. Close and restart Rhino for Mac
8. Follow the instructions to register and validate your license