Several users have reported that they receive the error message below when they attempt to upgrade to macOS Catalina.
Unfortunately, out of the box, macOS doesn’t let you set app specific volume levels. To do that, you need an app. There is no shortage of apps that allow you to set app specific volume levels on macOS however there are free apps, and there are paid apps. If you’re looking for something free, we recommend checking out Background Music. Experiencing a problem with several apps after installing macOS Catalina. When the app is downloaded from the internet I get the error: 'APP NAME' is damaged and can't be opened. Change Allow apps downloaded from: to App Store and identified developers. Note: For Mac High Sierra (10.13.x), you will need to click on Allow too. Click the lock icon again to prevent any further changes. Installing the Zoom application. Visit our Download Center. Under Zoom Client for Meetings, click Download. Double click the downloaded file. How to fix damaged app message on macOS Sierra or later. To resolve Gatekeeper issues on macOS Sierra and unlock images and programs ( annoying image/application is damaged messages pretending you cannot open things ). For that reason you might have to completely disable Gatekeeper checks, and to do that open your terminal and type. For some odd reason, the apps that are downloaded and installed from the Mac store are not opening for some users, even if you've used those apps before.
Error Message: This copy of the Install macOS Catalina application is damaged, and can’t be used to install macOS.
Are you having this problem? This article explains how you can fix this macOS application damaged error.
Please try each step one at a time until you resolve your issue.
1. Please make sure that you are trying to update to macOS Catalina by going to Apple Menu > System Preferences > Software Update. Do not use any other non-Apple source, such as a third party web site.
2. Delete the damaged macOS version and retry to download again. The copy of the damaged file is located in /Applications folder. You can also use the Terminal to do this. Here is how:
This will delete the app, now you need to re-download and install Catalina. Simply click the Upgrade Now button.
3. Try removing installinfo.plist. Here is how:
4. If still having this issue, this may be due to the invalid time on your Mac. You may have to correct this. Here is how: Steam app already running.
See also: Apple ID Settings problem
All of a sudden my husband’s macbook could no longer open any OSX apps, including Safari, App Store, iMovie, Photos, etc. Once attempted to be opened, the app icons show a ? instead of the usual app icon. He would then get the following error:
You can’t open the application because it may be damaged or incomplete
After several searches on Google, I stumbled upon this forum with many different solutions. The one that worked for him (and luckily quite simple) is to clear a few cached files using the following steps:
Once restarted, the apps on the macbook opened without issues an no longer showing the ? icons.
Hope this helps anyone! How to get the fitbit app on my mac.
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