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When you download a file, install an app, or copy a file from a USB drive, it\u2019s hard to know for sure that everything inside is safe. A manual antivirus scan checks the files already on your Mac whenever you run it, but real-time scanning stays active in the background, checking files as you access them.<\/p>\n
That makes real-time scanning an important layer of protection. In this guide, we cover what real-time scanning is, how it\u2019s different from manual and scheduled scans, how effective it is, and what it means for your Mac\u2019s performance.<\/p>\n
Real-time scanning is an antivirus feature that scans files automatically in the background while you use your Mac. Rather than waiting for you to start a scan, it checks files at the moments they are opened, downloaded, copied, or run. If a file seems unsafe, the software flags it and can move it to quarantine, so you can decide what to do as early as possible.<\/p>\n
Think of a download that looks like a normal installer but is really a Trojan<\/a>. Real-time scanning gives your antivirus a chance to recognize it as soon as it lands on your Mac or when you try to open it, instead of hours or days later when you happen to run a scan.<\/p>\n Fake software updates, such as fake browser updates that install password-stealing malware on Macs, are a good example of the kind of files real-time scanning looks for.<\/p>\n Real-time scanning works by checking files at the moments they\u2019re most likely to cause harm: when they arrive, when you open them, and when you run them.<\/p>\n At each of those points, your antivirus compares what it sees against what it knows about malware. If the file matches a threat or looks suspicious, the software moves it to quarantine and lets you decide how to handle it.<\/p>\n In practice, that plays out in a few common scenarios:<\/p>\n The main difference is timing: real-time scanning checks files automatically as you use your Mac, while manual and scheduled scans check the files already stored on it, either when you start a scan or at a time you set. Antivirus software can check your Mac in three ways, and each one does a slightly different job. Real-time scanning occurs continuously, watching files during your everyday use.<\/p>\n A manual scan (also called an on-demand scan) is something you initiate yourself, usually when you want to look through a folder, a drive, or your entire Mac.<\/p>\n A scheduled scan lets you pick a regular time for your antivirus to check your files or entire Mac automatically. This could be overnight or over the weekend, as long as your Mac is awake at that time.<\/p>\nHow does real-time scanning combat malware?<\/h2>\n
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Real-time scanning vs. manual and scheduled scans<\/h2>\n
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