I was just browsing the net when I ended up clicking on a dodgy link and it did some weird stuff to my browser so I had to force quite it. Now I want to make sure nothing has been left on my computer than I dont want.
There are websites that will do things such as run a script that refuses to quit, or a popup window that refuses to go away, as if holding your computer hostage. They are often associated with "dodgy" websites as you say. Such websites are not viruses or any other kind of malware that will be detected by anything in particular, but they are annoyances that affect any computer that loads webpages. Either problem can be fixed by forcing your browser to quit or erasing website data.
I know this is a question which always gets asked but do Macs really need anti virus protection? and if so is there a cheap or free one offered/reccommmded by apple which is good to get?
OS X already includes everything it needs to protect itself from viruses and malware, and it's free. Apple recommends keeping your Mac updated with software updates from Apple. Refer to the links below, which apply equally to Mavericks as well as its predecessor.
A much better question is "how should I protect my Mac":
- Never install any product that claims to "speed up", "clean up", "optimize", or "accelerate" your Mac. Without exception, they will do the opposite.
- Never install pirated or "cracked" software, software obtained from dubious websites, or other questionable sources. Illegally obtained software is almost certain to contain malware.
- Don’t supply your password in response to a popup window requesting it, unless you know what it is and the reason your credentials are required.
- Don’t open email attachments from email addresses that you do not recognize, or click links contained in an email:
- Most of these are scams that direct you to fraudulent sites that attempt to convince you to disclose personal information.
- Such "phishing" attempts are the 21st century equivalent of a social exploit that has existed since the dawn of civilization. Don’t fall for it.
- Apple will never ask you to reveal personal information in an email. If you receive an unexpected email from Apple saying your account will be closed unless you take immediate action, just ignore it. If your iTunes or App Store account becomes disabled for valid reasons, you will know when you try to buy something or log in to this support site, and are unable to.
- Don’t install browser extensions unless you understand their purpose. Go to the Safari menu > Preferences > Extensions. If you see any extensions that you do not recognize or understand, simply click the Uninstall button and they will be gone.
- Don’t install Java unless you are certain that you need it:
- Java, a non-Apple product, is a potential vector for malware. If you are required to use Java, be mindful of that possibility.
- Disable Java in Safari > Preferences > Security.
- Despite its name JavaScript is unrelated to Java. No malware can infect your Mac through JavaScript. It’s OK to leave it enabled.
- Block browser popups: Safari menu > Preferences > Security > and check "Block popup windows":
- Popup windows are useful and required for some websites, but popups have devolved to become a common means to deliver targeted advertising that you probably do not want.
- Popups themselves cannot infect your Mac, but many contain resource-hungry code that will slow down Internet browsing.
- If you ever see a popup indicating it detected registry errors, that your Mac is infected with some ick, or that you won some prize, it is 100% fraudulent. Ignore it.
- Ignore hyperventilating popular media outlets that thrive by promoting fear and discord with entertainment products arrogantly presented as "news". Learn what real threats actually exist and how to arm yourself against them:
- The most serious threat to your data security is phishing. To date, most of these attempts have been pathetic and are easily recognized, but that is likely to change in the future as criminals become more clever.
- OS X viruses do not exist, but intentionally malicious or poorly written code, created by either nefarious or inept individuals, is nothing new.
- Never install something without first knowing what it is, what it does, how it works, and how to get rid of it when you don’t want it any more.
- If you elect to use "anti-virus" software, familiarize yourself with its limitations and potential to cause adverse effects, and apply the principle immediately preceding this one.
- Most such utilities will only slow down and destabilize your Mac while they look for viruses that do not exist, conveying no benefit whatsoever - other than to make you "feel good" about security, when you should actually be exercising sound judgment, derived from accurate knowledge, based on verifiable facts.
- Do install updates from Apple as they become available. No one knows more about Macs and how to protect them than the company that builds them.
Summary: Use common sense and caution when you use your Mac, just like you would in any social context. There is no product, utility, or magic talisman that can protect you from all the evils of mankind.
IF they dont, can anyone explain the reasoning behind this as I genuinly want to know
OS X Mountain Lion: Protect your Mac
OS X Mountain Lion: Protect your Mac from malware
OS X Mountain Lion: Keep your information safe
OS X About Gatekeeper
About file quarantine in OS X
