Apr 01, 2020 Combo Cleaner is an all-in one Anti-Malware and Optimizer software for MacOS. The powerful app is capable of cleaning your Mac and optimizing it. Automatically delete “Mac OS X is infected (4) by viruses” pop ups with MalwareBytes AntiMalware. Manual “Mac OS X is infected (4) by viruses” pop-ups removal requires some computer skills. Some files that created by the adware can be not fully removed. Apr 06, 2012 When the OS X installer loads, select your language and then open Disk Utility (available in the Utilities menu if it's not presented in a Tools window). In Disk Utility, select your boot volume. The disk cleaner function removes all junk files from the Mac, including browsers cache files and some others. The 'Big Files' function finds all files larger than a minimum requirement specified. In this way, you can decide whether these large files are necessary, or to delete them.
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Disk Utility User Guide
Disk Utility can fix certain disk problems—for example, multiple apps quit unexpectedly, a file is corrupted, an external device doesn’t work properly, or your computer won’t start up. Disk Utility can’t detect or repair all problems that a disk may have.
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If you run First Aid on a disk, Disk Utility checks the partition maps on the disk and performs some additional checks, and then checks each volume. If you run First Aid on a volume, Disk Utility verifies all the contents of that volume only.
If your Mac has a Fusion Drive and you see a flashing question mark or alert, see the troubleshooting section of the Apple Support article About Fusion Drive, a storage option for some Mac computers.
If you continue to have problems with your disk or it can’t be repaired, it may be physically damaged and need to be replaced. For information about servicing your Mac, see Find out how to service or repair your Mac.
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See alsoErase and reformat a storage device in Disk Utility on MacAdd, delete, or erase APFS volumes in Disk Utility on MacPartition a physical disk in Disk Utility on Mac
Gatekeeper has been built into OS X since the days of Mountain Lion, but if you open up Spotlight and search for it, you won't find an app or system preference by that name. Gatekeeper is what Apple calls OS X's defense against 'malware' — malicious software. Gatekeeper restricts how software from third-party developers runs on your Mac, so understanding what it is and how it works can be pretty important.
What is Gatekeeper and should you use it?
Apple offers the Mac App Store as a safe and convenient way to download apps for your Mac (and to update system software too). It operates similarly to the App Store on iPhone and iPad. But there's one key difference: Unlike the iPhone and iPad, the Mac isn't restricted from running software just from the Mac App Store. You can download Mac apps from anywhere.
Given that reality, Gatekeeper helps OS X makes sure that app is safe to run, even if it's not from the Mac App Store. Gatekeeper checks for the presence of a digital certificate embedded in the app itself that tells the Mac the app is from a signed developer who has registered with Apple.
The default setting for Gatekeeper on most Macs is 'Mac App Store and identified developers.' (The exception is OS X Lion 10.7.5. This was the first time Apple offered Gatekeeper, and its default setting is 'Anywhere.') If you try to change the setting to 'Anywhere', the Mac will warn you against it (though it will make the change if you tell it to.)
You can shut off this protection, though I wouldn't recommend it. Gatekeeper is there to stop malware from getting on your Mac, and that's a good thing.
How to use Gatekeeper
Bonus tip
You can also open apps from unidentified developers in the Finder. If you've downloaded an app and the Mac won't let you open it, follow these steps.
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