Even if I block all cookies, when I open Safari it opens my home page on one tab, and a second tab to a site I do not want. (A transit information site run by "byway.com") I have removed all the web information and history, but it still persists. Any clues as to how to get rid of it?
iMac, OS X Yosemite (10.10.4), 3.4 GHz Intel Core i7, Mid 2011 16G
The problem is most likely caused by malicious software ("malware") that you installed without knowing what it was.
This easy procedure will detect any kind of ad-injection malware that I know of. Deactivating the malware is a separate, and even easier, procedure.
Some legitimate software is ad-supported and may display ads in its own windows or in a web browser while it's running. That's not malware and it may not show up.
Step 1
Please triple-click the line below on this page to select it, then copy the text to the Clipboard by pressing the key combination command-C:
~/Library/LaunchAgents
In the Finder, select
Go ▹ Go to Folder...
from the menu bar and paste into the box that opens by pressing command-V. Press return. Either a folder named "LaunchAgents" will open, or you'll get a notice that the folder can't be found. If the folder isn't found, go to the next step.
If the folder does open, press the key combination command-2 to select list view, if it's not already selected. There should be a column in the Finder window headed Date Modified. Click that heading twice to sort the contents by date with the newest at the top. If necessary, enlarge the window so that all of the contents are showing.
Follow the instructions in this support article under the heading "Take a screenshot of a window." An image file with a name beginning in "Screen Shot" should be saved to the Desktop. Open the screenshot and make sure it's readable. If not, capture a smaller part of the screen showing only what needs to be shown.
Start a reply to this message. Drag the image file into the editing window to upload it. You can also include text in the reply.
Leave the folder open for now.
Step 2
Do as in Step 1 with this line:
/Library/LaunchAgents
The folder that may open will have the same name, but is not the same, as the one in Step 1. As in that step, the folder may not exist.
Step 3
Repeat with this line:
/Library/LaunchDaemons
This time the folder will be named "LaunchDaemons."
Step 4
Open the Safari preferences window and select the Extensions tab. If any extensions are listed, post a screenshot. If there are no extensions, or if you can't launch Safari, skip this step.
Step 5
If you use the Firefox or Chrome browser, open its extension list and do as in Step 4.
Thanks, you gave me the clue to solve it already. It had installed a Safari extension. Removing the extension has solved the problem.
Safari won't stop opening tab to unwanted site
