How To tell if Mac remotely accessed

If you suspect your Mac might have been remotely accessed without your permission, it’s crucial to identify the signs early and secure your device promptly. This step-by-step guide will help you detect any unauthorized remote access to your Mac, ensuring your data and privacy stay protected.

Step 1: Check for Unusual Notifications

Look for any system notifications about remote access. macOS usually notifies you if another device accesses your Mac via screen sharing or file sharing. Similarly, third-party remote access apps like TeamViewer will send access alerts. Don’t ignore unexpected or suspicious notifications — these are often the first indication that someone else is connected to your Mac.

Step 2: Monitor Your Mac’s Performance

Observe if your Mac is behaving strangely, such as:

• The mouse cursor moving on its own.

• Unexpected pop-up windows appearing.

• Sudden system slowdowns or unusual battery drain.

• Being locked out of your user account.

These symptoms can indicate remote control or interference.

Step 3: Review Remote Login Settings

Verify if Remote Login is enabled:

• Go to Apple menu > System Settings (or System Preferences).

• Select General and then Sharing.

• Check if Remote Login is turned on.

If enabled without your knowledge, this means someone could access your Mac using SSH (Secure Shell). Disable Remote Login if you don’t need it, or verify that only trusted users have permission.

Step 4: Inspect Active User Sessions and Network Activity

Use Activity Monitor to check current users and network connections:

• Open Applications > Utilities > Activity Monitor.

• Go to the Network tab to spot any unusual outgoing or incoming data connections.

• Check the Users tab to see who is currently logged in.

High network usage by unfamiliar processes or unknown logged-in users may signal remote access.

Step 5: Check for Suspicious Applications or Processes

Look for unfamiliar applications or running processes that could indicate spyware or remote control software installed without your knowledge.

Open Activity Monitor and carefully scan processes for unknown names.

Also, review Applications for any recently installed apps you didn’t authorize.

Step 6: Scan Your Mac for Malware

Run a comprehensive malware scan using reliable software. Malware often accompanies unauthorized remote access.

Specialized tools like CleanMyMac or other trusted antivirus programs can detect adware, ransomware, or cryptocurrency mining tools silently running on your Mac.

Perform a deep scan for best results and remove any threats found.

Step 7: Secure Your Mac to Prevent Future Access

If you discover signs of remote access, take these steps to protect your Mac:

• Disconnect from the internet immediately to stop ongoing remote sessions.

• Change all your passwords, especially for your Mac user accounts and Apple ID.

• Turn off Remote Login and Sharing services if not in use.

• Enable your firewall via System Settings > Network > Firewall to block unauthorized connections.

• Consider using a VPN to mask your IP address and secure your network traffic.

• Keep your macOS and software updated with the latest security patches.

Following these steps will help you identify and stop any unauthorized remote access to your Mac, keeping your information safe and your computer secure.