If you still want to take steps to keep your Mac as secure as possible, there are safe, proven solutions out there.
For example, SecureMac makes two great programs:
MacScan and PrivacyScan.
They’ve won awards at international MacWorld events, and those recommendations aren’t handed out lightly.
MacScan and PrivacyScan target different things, with MacScan being focused on security, and PrivacyScan on, well, privacy.
Whereas MacScan is mainly an anti-malware and anti-spyware program, PrivacyScan will check for browsing history, cookies, flash cookies, cache files, recent searches, and many other items for supported web browsers, as well as recent items in the Finder, Preview, and QuickTime.
PrivacyScan offers the option to shred privacy threats, ensuring they cannot be recovered, thus keeping your private information private.
I run MacScan and PrivacyScan separately every evening, after I’m finished working for the day.
You can run “Quick Scan” on MacScan every day, and the “Full Scan” option once a month or so. The latter takes quite a long time to do its job.
I’ve set PrivacyScan to “shred” at the highest level. It’s set up to look like a real-life paper shredder — you can turn on the sound effects so that it will sound like one too while it works.
If that noise drives you nuts, though, you can switch it off.
I prefer keeping the sound on, however — it makes me feel the junk really is being destroyed.