The second method is to download and install Safe Download Version, a freeware app created by Adam Christianson of The Mac Observer. If you don’t see this checkbox, you should make sure you’re running either Lion (v10.7 or later) or the latest version of Snow Leopard (v10.6.8).Īlthough this is the simplest solution, it doesn’t give any indication of whether the update has actually completed, which is why I prefer to use the following alternative instead. The first method is to click on the Apple menu and select “System Preferences…” and then from the main window click on Security, then click on the General tab, and then uncheck and re-check the box next to “Automatically update safe downloads list” (note that you may need to click on the lock and type an administrator password first). Mac OS X is supposed to check for updates to this malware definitions list daily, but you can force an update using one of the following techniques. When you download an application via Safari or an attachment in Mail and then try to open it, Apple checks the file against its “safe downloads list” (sometimes called “ist” after its file name) to ensure it doesn’t contain any known Mac malware. Did you know that Mac OS X includes some very basic protection against malicious downloads?
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