This can happen when the system clock is set too far in the past. This means you either do not have an internet connection to proceed with the activation or you need to do an Offline Activation. Click Learn More in the message if you feel this software key should be valid. If you are copying and pasting it in, please try typing it in manually. Please double check that the software key was entered correctly. This means this software key was not typed or pasted in properly or is no longer a valid license key due to various reasons. Please click Learn More in the message on what steps should be taken. The software key can no longer be used to Activate Snagit without action. This means this software key has been used more than twice to activate Snagit and is in violation of our EULA (End User License Agreement). A single user software key can only be used on up to two machines for the same user. A single user software key can only be used on up to two machines for the same user. This means this software key has been used more than twice to activate Snagit and is in violation of our EULA (End User License Agreement). You do not have to take any action at this time, but if you wish to learn more about licensing activation, click Learn More in the message. A single user software key can be used on up to two machines for the same user. This means the software key has been used twice to activate Snagit. When unlocking Snagit for Mac with your software key, you are presented with one of the following messages:

Snagit mac key