When you download application installers and other files from the Internet, you may see a verification checksum associated with it. Here is how to use that number.
Mac OS X 10.3.9: Checksum error with initial posting of Mac OS X 10.3.9 combo, resolved
If you need more than CRC-32 checksumming options in Disk Utility, a quick hidden preference setting can enable a number of additional options.
Apple improves Mail compatibility with Gmail, and fixes other security and compatibility issues in the first update to Mavericks, OS X 10.9.1.
If you would like to verify two copies of files or two mirrored directories, there are some Terminal commands that will let you do just that.
KeyQuencer Lite 2.5 Installer Trojan Horse: a follow-up
An Android version of the longtime file compression utility, WinRAR, has arrived in Google Play with a powerful set of archiving tools.
Sometimes the Mac App Store caches a corrupt installer, which can cause persistent verification errors. But there's an easy way to fix it.
If you run into a problem where a downloaded file cannot be verified, there are a couple of options you can try.
After downloading the OS X Lion installer from the Mac App Store, some people are finding the installer cannot be verified and will not run.