Trend Micro Antivirus can't be opened Error on Mac

You see this message after opening Trend Micro Antivirus for Mac:

"The application Trend Micro Antivirus can't be opened."

Why is this happening?

This error usually means something went wrong during an update, and part of your antivirus software got corrupted.

How to Fix It

Let's get your antivirus working again by updating it. Just follow these simple steps:

1. Remove the Old Antivirus:
   1. Click on the magnifying glass (Spotlight) on your Mac, type "Trend Micro".
   2. Choose Uninstall Trend Micro Antivirus.
   3. When asked, type in your Mac password.
   4. Click the Uninstall button and then hit OK to confirm.
   5. Wait for a message that says it's all clear, then click OK.
2. Get the New Antivirus Software:

   Download the installer that matches your macOS version from the list below:

   • macOS Tahoe (26.0): Download Antivirus for Mac version 11.9.36
   • macOS Sequoia (15.0): Download Antivirus for Mac version 11.8.1283
   • macOS Sonoma (14.0): Download Antivirus for Mac version 11.8.1283
   • macOS Ventura (13.0): Download Antivirus for Mac version 11.8.1283

   If your macOS version is macOS Mojave or older, consider upgrading your Mac to access the latest antivirus features.

3. Install the New Antivirus:
   1. Open the file you just downloaded.
   2. Click Install Trend Micro Antivirus.
   3. Follow the instructions on your screen.
   4. Type in your activation key when asked.
   5. After the installation, make sure to allow full disk access for complete protection.

Your Trend Micro Antivirus should now say it's "Protected," and you're all set to go!