Don't finish the Scan

Leopoldo, To take a screenshot in MAC, please follow the below instructions : 1. To capture the entire screen, press Command-Shift-3. The screen shot will be automatically saved as a PNG file on your desktop with the filename starting with “Picture” followed by a number, example Picture 1, Picture 2, and so on. 
2. To copy the entire screen, press Command-Control-Shift-3. The screen shot will be placed on your clipboard for you to paste into another program like PowerPoint, Word, Photoshop, etc.
For your info, just in case that you are unaware, you can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.
AVG Guru

Hello Leopoldo,
I'm sorry to hear that you're experiencing issue with AVG Scan on your mac computer. Please send us a screenshot of the error message (you received while AVG scan) to assist you better.
Best regards,
Alok.

Don't finish the Scan
Message: AVGAntiVirus [830]
Terminating app due to uncaught exception 'NSinternalinconsistencyException' reason: 'invalid scan status' abort() called terminating with uncaught exception of type NSException
 MacOsX ver 10.12.5   please help!!!

Hello Leopoldo,
I'm sorry to hear that you're experiencing issue with AVG Scan on your mac computer. Please send us a screenshot of the error message (you received while AVG scan) to assist you better.
Best regards,
Alok.

Leopoldo, To take a screenshot in MAC, please follow the below instructions : 1. To capture the entire screen, press Command-Shift-3. The screen shot will be automatically saved as a PNG file on your desktop with the filename starting with “Picture” followed by a number, example Picture 1, Picture 2, and so on. 
2. To copy the entire screen, press Command-Control-Shift-3. The screen shot will be placed on your clipboard for you to paste into another program like PowerPoint, Word, Photoshop, etc.
For your info, just in case that you are unaware, you can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.
AVG Guru