I have imac 10.6.8 and found my homepage had changed somehow to Opti-search I reset my homepage but anytime I try to search Bing or Google my address bar goes to http://www.opti-page.com but does not complete loading does anyone know what I can do

It's malware ...

Force quit Safari using the Command + Option + Esc keyboard shortcut.

Then relaunch Safari while holding down the Shift key then download and run Malwarebyyes Anti-Malware for Mac formerly known as AdwareMedic. It's free.

If you would rather not download Malwarebytes Anti-Malware, you can remove the malware manually following the instructions here > Remove unwanted adware that displays pop-up ads and graphics on your Mac - Apple Support

From the Safari menu bar, select

Safari ▹ Preferences... ▹ Extensions

Turn all extensions OFF and test. If the problem is resolved, turn extensions back ON and then disable them one or a few at a time until you find the culprit.

For manual removal on 10.6.8, see:

http://www.thesafemac.com/arg-operatormac/

Be aware that completely removing this adware is more involved than just removing a browser extension.

(Fair disclosure: I am affiliated with Malwarebytes, whose site I am linking to above.)

You're done. You don't need to remove anything else.

Crystal Newkirk wrote:

Well I tried to download the adwaremedic but unfortunately my latest version is 10.6.8 and it says I need at least 10.7 to install.

Yes, you can't use that. You needed to follow the instructions at the link I posted to remove it manually. Note that this is very important to do. Contrary to what Linc has said, if all you removed was a Safari extension, you're most definitely not done. Unless you have done something else in addition, you'll still have more running in the background.

If you've already followed the advice at that link, and removed those files, then you're really done. On the other hand, if you're having trouble with that, let me know, and I can help you further.