Mac app store download an error has occurred

Corrupted cache files may be the reason behind Unknown Error Occurred So, to fix this error, clean up the cache files and try downloading the app.

If you still face this error, simply log out of Mac App Store, close it, launch it again, log in and try downloading the app again. NOTE: Here is the path for the cache files that are needed to be deleted:. Step 1. Backup important Mac data in advance Step 2. Solve macOS Sierra update stuck issue or install freeze error Step 4. Download and install macOS Sierra Now let's follow to update and install macOS Sierra In order to avoid unexpected data loss error or problems while installing new macOS Sierra in Mac, it's highly necessary to create data backups in advance.

You may directly apply Time Machine as a free tool to full backup your important Mac data with simple clicks. If you don't have a backups and lost some data while installing new macOS Sierra update, you can try professional Mac data recovery software to get all lost data back. If your Mac shows a error message that 'An error has occurred' or 'Failed to Download' while you are trying to downloading a new update for macOS Sierra. And this has become a common issue that many users have to face while upgrading Mac to a new operating system.

This is yet another reason to try and keep a single Apple ID in use for all of your user activity, though there are. I see that you receive the error code: 0x, and are unable to install or update apps from Windows Store. You might be facing the issue if the Store Cache is not cleared, UAC control is disabled, and if there is any proxy connection set. Place the computer in clean boot and check if the issue persists.

If they match, you have an installer that is assumed to be intact, but if not, then an error occurred that may have compromised the integrity of the installer and may result in an unstable or harmful installation. Checksum errors can happen for various reasons, including malicious tampering with the file usually rare , slight alterations to the file and its metadata including the initially stored checksum signature as it is stored both on the server and on your computer, and more commonly because of interruptions during data transfer.

Regardless of the reason, if checksum errors occur and the file cannot be verified, then it is best to re-download the file to ensure that you get a fully intact copy.

The App Store will save downloaded application installers to a hidden cache; if an integrity error occurs, then the store should remove this downloaded file and start over.

However, problems may prevent this from happening and result in the App Store attempting to run the cached faulty installer every time instead of re-downloading a new version to try.

If this type of error happens, the best approach is to dig into your system and remove the cache for the App Store, which should clear out the faulty installers and make the store re-download them.