Malware definition updates arrive through Apple’s normal software update process. Like other software updates on Mac OS X, these are enabled by default, but can be disabled. When you open a downloaded application, File Quarantine checks if it matches any of the malware definitions in the XProtect file. If it does, you’ll see a nastier warning message that says running the file will damage your computer and informing you which malware definition it matches.
You can even open this file and see the list of malicious applications Mac OS X is checking for when you open downloaded application files. This paid software can be used for 10 devices in total.Back in 2009, Apple made File Quarantine also check downloaded application files against a list stored in the System/Library/Core Services/CoreTypes.bundle/Contents/Resources/ist file on your Mac. Since AVG Tune-up is not free for Mac, you need to pay a one-time fee of ₹999.
In a nutshell, the miscellaneous features are as follows: it saves you time by recommending only those versions which are useful to you based on your usage pattern. It automatically detects which updates are necessary. It detects which programs you use the most and suggests important software updates.