What is LeadingSystem?

LeadingSystem is a potentially unwanted program that may get on your Mac along with other software. LeadingSystem can hijack browsers such as Safari, Google Chrome, and Mozilla Firefox. It is not a virus, but it can cause irreparable damage to your computer. This program deals with the dissemination of advertisements. LeadingSystem displays coupons and banners with a ton of ads. Many of the proposals of this program does not real, that’s why users risk spending money for nothing. It is created to make money, it’s a useless program. In addition, it can become a conduit for other malicious programs. Therefore, if you find LeadingSystem on your Mac, you should remove it immediately.

Recommended Anti-malware tools:

The easiest and most modern way of removing hijackers, pop-ups, Trojans, ransomware, or other viruses is to use automatic removal tools. See our Anti-malware tools below for further instructions.

Also, you can try to remove LeadingSystem manually.

Alternative solution. Step 1: Remove LeadingSystem from Mac

LeadingSystem may not have the app associated with it in Applications. However, we recommend you to inspect the list of installed applications and remove unknown or suspicious ones. Look for LeadingSystem or LeadingSystem.app.

Mac OSX:

1. Open Finder
2. In the Finder sidebar, click Applications
3. If you see Uninstall LeadingSystem or LeadingSystem Uninstaller, double-click it and follow instructions
4. Drag unwanted application LeadingSystem from the Applications folder to the Trash (located on the right side of the Dock)

Learn more about uninstallation of programs in Mac OSX

Step 2: Remove malicious entries from Profiles (Mac)

1. Open System Preferences.
2. Click on Profiles.
3. Click on unsigned and suspicious profiles on the left panel.
4. Click the minus button below to delete rogue settings.

Step 3: Remove LeadingSystem from browsers

Safari:

1. Open Safari
2. Click Safari menu.
3. Choose Extensions.
4. Find LeadingSystem or other suspicious extensions.
5. Click Uninstall button to remove it.

Learn more about removing extensions from Safari.

Google Chrome:

1. Open Google Chrome
2. Click the Chrome menu (3-dots icon) in the top right corner.
3. Click Tools.
4. Choose Extensions.
5. Find LeadingSystem or other suspicious extensions.
6. Click the trash can icon to remove it.

Learn more about removing extensions from Chrome.

Mozilla Firefox:

1. Open Firefox.
2. Push Shift + Ctrl + A.
3. Choose LeadingSystem or other suspicious extensions.
4. Click Disable or Remove button.

Learn more about removing extensions from Firefox.

Step 4: Resetting your browser search and homepage settings

Reset browser setting in Safari:

1. Open Safari.
2. Click on the Safari menu.
3. Choose Reset Safari….
4. Click Reset button.

Learn more about resetting browser settings in Safari.

Reset browser setting in Google Chrome:

1. Click the Chrome menu (3 bar button) in the top right corner.
2. Choose Settings.
3. Click Show advanced settings.
4. Go to Reset browser settings section.
5. Click Reset browser settings.
6. In the dialog that appears, click Reset.

Learn more about resetting browser settings in Google Chrome.

Reset browser setting in Mozilla Firefox:

1. Open Mozilla Firefox.
2. Go to Help.
3. Go to Troubleshooting information.
4. Click Reset Firefox… button.

Learn more about resetting browser settings in Mozilla Firefox.