We can no longer formally affirm that there is no virus on the Mac, but these are exceptional.
As a general rule, the criminals are less likely to develop programs that target the Mac for two reasons very simple : their number is limited and their operating system is very secure. In addition, Apple is extremely vigilant about the safety of its products and publishes regular updates to protect against possible attacks.
However, in 2016, the brand apple has had to face his first ransom-software : KeRanger. The latter took advantage of a flaw in the system and it is passed by the platform, BitTorrent to infect a Mac.
Discover also our selection of best antivirus for Mac.
Malware : a definition .
Malicious software is a program (virus, spyware, Trojan horse, ransom-software..) whose purpose is to hijack your private information or of taking possession of your computer for criminal purposes.
Malware is often disguised as official programs for you to install it on your computer. They may appear in advertisements, emails .. once installed on your computer, they gather information on you and, in most cases, try to steal your banking data.
The height of cynicism, some malicious software masquerading as antivirus !
So, never download MacDefender, MacProtector or MacSecurity.
They work in the following way : a hacker gains control of a legal site and directs you to a fake internet site. Here, you will be asked to enter your Apple id to install an antivirus. Once on your computer, the program pretends to scan it, to find a virus, then you claiming your bank account details to remove it.
Note that MacKeeper is a other software that has been reported as being malicious. This is not a virus as such, but the business practices of its manufacturers are not really recommendable. They have, in effect, been sentenced for having intentionally reported false security holes on computers. The goal ? Trap their customers so that they purchase the paid version of the antivirus to 39.95$ (35,62 €).
Remove malware for free .
Important Point : you should never pay to remove a virus from your computer. As a general rule, never enter any personal information, especially your banking details on a site or in a program that promises you to repair your computer. It is the same by phone. If someone calls you and tells you know that your Mac is infected, hang up.
If browsing the web you come across a website you are affirming that your computer is infected, perform the following steps :
1 – If you’re in Safari (or any other internet browser) and a web site warns you about a virus, exit the program by using the shortcut Command + Q or going to Safari → Quit Safari. If he refuses to exit, click the apple in the top left of your screen → Force quit and select your internet browser.
2 – Go to your folder Téléchargement and place any documents that you do not recognize in your recycle Bin.
3 – Empty your recycle bin. Press and hold the Control pressed while you click on its icon and select Empty trash.
If you think you have downloaded malicious software inadvertently, perform the following steps :
1 – If the application that you suspect is open, note down its name and close it.
2 – Open your Utilities by doing Command + Shift + U.
3 – Open your activity Monitor.
4 – In the menu bar at the top of the screen, click Presentation and then select All of the operations.
5 – Type the name of the suspicious application in the search bar (top right). Also make sure that you do not have MacDefender, Mac Security, or MacProtector installed on your computer.
6 – If one of the programs appears, select it and click on the button to Exit (the button in the shape of a stop sign with a cross).
7 – Quit the activity Monitor (activity Monitor → Quit)
9 – Open your folder Applications and locate the suspicious program.
10 – drag its icon to your recycle bin and empty it.
Please do not hesitate to consult with Apple support, and if the doubt persists, make an appointment at an Apple Store.
Ransom-software, ransomware and software ransom.
Ransom-software, software ransom and ransomware are synonyms that refer to the same problem : a malicious software program whose purpose is to con you out of money.
A ransom-software encrypts the data on your computer, and to be able to regain the use, it asks you to pay a ransom. Note that there is no guarantee that your computer is unlocked when you pay.
In the case of KeRanger in 2016, the ransom asked for was $ 400 to be paid in Bitcoins.
Phishing, phishing and phishing.
In comparison to the PC, the Mac is particularly well protected against viruses. The risk lies in human error.
Thus, the phishing, also called phishing, and phishingis one of the key causes of online piracy. It is to trap someone by e-mail to reveal personal information (bank details, access codes to online services ..).
The phishing emails can be particularly persuasive (official logos, names of people who work in the company ..), it is necessary to be very vigilant.
Note that phishing can be transmitted by contact, without the know. Thus, before you download an attachment or click on link unknown, make sure that it has really been sent by someone you know. If it is an official authority (e.g. tax, FCA ..) don’t hesitate to call if you have any doubt.
Protect its Mac.
A few key principles can help you protect your computer from malicious software.
– Make sure that your operating system is up to date. For this you have to go in theApp Store → Updates → update.
– Select the automatic update by performing the following steps. Open System Preferences → App Store and select Search for updates automatically + Install the updates from OS X + Install system data files and security updates.
– Make sure your Mac only allows verified applications. In system Preferences, click Security and privacy. Choose to allow applications downloaded from Mac App Store and identified developers.
Mac and Antivirus.
There are divergent opinions in the community Apple : some are for the anti-virus, other not.
Macs are widely considered more secure than the PC, to reason. But as we have seen, they are not impervious to all the malware.
If you want to scan your Mac to see if it includes suspicious programs, you can use the trial version of ClamXav.
Once downloaded, open ClamXav and click the button Start Scan. Note that the process takes more or less time depending on the number of files stored on your computer.