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For Mac OS is it necessary to buy an antivirus software? Or it comes within the OS?

 
Ranch Hand
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I'd like to know if it is necessary buying antivirus software for Mac OS or this is something that comes within the OS (like Microsoft Essentials).
 
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It doesn't come with antivirus software, however the risk of getting a virus on a mac is really really really low, so most mac users don't bother getting any.
 
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The low impact approach would be to install ClamXav, have it update itself regularly, and set up its sentry to scan those directories where downloads from web browsers and email clients go (and whatever other directories where you regularly put files from external sources).
 
Greenhorn
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I am using Mac for last 2 years and found that Mac system is less prone to virus as compare to other platforms. However, Mac behaves so slow and exhibit sluggish performance. During this time, defrag Mac hard drive is the best way to speed up Mac.
 
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Hello Cartin, welcome to the Ranch!

cartin Riley wrote:defrag Mac hard drive is the best way to speed up Mac.


For most 'normal' users, this is not true. The HFS file system, used by OS X, does not fragment data in the same way that Windows file systems do, so you do not need to perform regular defrag operations. In fact, I have never done it on any of my Mac's.

I suspect the performance issues you are experiencing on your Mac are due to some other problem.
 
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I've been using Macs for almost 2 decades and never have I done a disk "defrag". It's just not necessary. If you are experiencing slowness, it's certainly some other issue.
 
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Back on the topic of the original poster, interesting article out today about a new "non-removable" virus for Mac:
http://www.zdnet.com/article/macs-vulnerable-to-virtually-undetectable-virus-that-cant-be-removed

Using a modified Thunderbolt adapter, researchers realized they could change the Boot ROM and infect that area with a virus.
So, friends don't let friends use strange Thunderbolt adapters!

Oh, and I've been a Mac user for about five years and never needed a defrag. Mac writes in smaller blocks than Windows, resulting in less fragmentation issues.
The only exception I've heard of is a friend who uses an older Mac Pro for professional video editing and special effects work. He regularly has a few hundred files over 1GB each in size.

(Perhaps as we move more to SSD, defrag issues will eventually be negated on PC's, too).

Cheers!
Chris

 
cartin Riley
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Tim Cooke wrote:Hello Cartin, welcome to the Ranch!

cartin Riley wrote:defrag Mac hard drive is the best way to speed up Mac.


For most 'normal' users, this is not true. The HFS file system, used by OS X, does not fragment data in the same way that Windows file systems do, so you do not need to perform regular defrag operations. In fact, I have never done it on any of my Mac's.

I suspect the performance issues you are experiencing on your Mac are due to some other problem.



Yes, I understand this. I keep my favorite videos and games at multiple locations and sometimes I delete few unused movies. So, in case of large bulky files, I tried to defrag My Mac and found a speedy Mac. That's why I mentioned about drive defrag operation.
 
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