Web pages are displaying properly? Did you uninstall any programs, like SpeedDownload, or any download manager? Web pages look normal, nothing was recently added or removed. The problem occurs whether she clicks on a download button, or tries to manually drag a graphic onto the desktop.
There is no acknowledgemnt from the machine that anything took place. If the download folder is set to one of these locations and you get that error message, click on that folder in the Finder and then choose Get Info from the File menu. Since she has the same problem with both Safari and Firefox, it seems unlikely that it is a problem within these programs. Both are set to use the default folder, and worked fine until recently.
You might also try downloading the most recent combo updater for Mac OS X. If you're running If you do, the file may have been corrupted during the download.
Delete it, then try downloading it again. In the Safari app on your Mac, click the Show Downloads button near the top-right corner of the Safari window. Pause a download: Click the Stop button to the right of the filename in the downloads list. To resume, click the Resume button. Find a downloaded item on your Mac: Click the magnifying glass next to the filename in the downloads list.
This means that the problem is not unique to Catalina but it is something that affects the entire macOS system. If the right-click menu is grayed out or nothing happens when you click any of the Open With options, you can try mounting the file using Terminal instead. Drag the file to the Desktop and follow the steps below:. If you cannot open the DMG file using the two methods above, you can try using a third-party utility instead.
Here are some of the apps you can try:. However, it is normal to run into errors when opening a DMG file, especially if the file has been corrupted or has not been completely downloaded on your device. If this is the case, you can try any of the three methods listed above to open the problematic DMG file. Same here — I am so grateful to have found this page. FYI, in case it drives traffic to your page and helps out other people in my situation, I was trying to mount Quickbooks for Mac on a computer running Big Sur.
Your email address will not be published. Contents hide. Unable to Open. You can use Mac repair app to scan and clean up your computer for all types of junk. Pro Tip: Scan your Mac for performance issues, junk files, harmful apps, and security threats that can cause system issues or slow performance.
Your Mac uses Spotlight to determine what apps you have installed. And perhaps, due to a bug or a corrupted file, your operating system thinks that the app you are trying to download is already in your system which is why it is not letting you download it again.
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