If you installed the "SearchProtect" browser hijack, you haven't completely removed it.
Malware is constantly changing to get around the defenses against it. The instructions in this comment are valid as of now, as far as I know. They won't necessarily be valid in the future. Anyone finding this comment a few days or more after it was posted should look for more recent discussions or start a new one.
Back up all data before proceeding.
Triple-click anywhere in the line below on this page to select it:
/Library/LaunchDaemons/com.perion.searchprotectd.plist
Right-click or control-click the line and select
Services ▹ Reveal in Finder (or just Reveal)
from the contextual menu.* A folder should open with an item named "com.perion.searchprotectd.plist" selected. Drag the selected item to the Trash. You may be prompted for your administrator login password.
Restart the computer and empty the Trash. Then delete the following items in the same way:
/Applications/SearchProtect
~/Library/Application Support/Firefox/searchplugins/MyBrand.xml
~/Library/Application Support/Google/Chrome/External Extensions/fjadmdmahkpbhgbmmkiiaanlnlekelmn.json
~/Library/Application Support/Mozilla/Extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/deacruzemiliano@outlook.com
~/Library/Internet Plug-Ins/TroviNPAPIPlugin.plugin
~/Trovi
Some of these items may be absent, in which case you'll get a message that the file can't be found. Skip that item and go on to the next one.
Quit and relaunch Safari. From the menu bar, select
Safari ▹ Preferences... ▹ Extensions
Uninstall any extensions you don't know you need, including any that have the word "Trovi" or "palmall" in the description. If in doubt, uninstall all extensions.
Reset the default search engine and home page to what it was before.
"SearchProtect" may be distributed along with two other applications: "MacKeeper," which is a scam, and "ZipCloud," which, if not actually a scam, has a dubious reputation. Ask if you need instructions to remove those items.
*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination command-C. In the Finder, select
Go ▹ Go to Folder...
from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.
