Thanks for the reply, I ended doing a clean installed of the system and apps, then I moved my files manually. It worked perfectly and my Mac was running like new until yesterday that I did the Mac OS 10.15.2 update, now all the files on all the accounts in the computer are '.'is damaged and can’t be opened.
- All Mac OS versions run on a technology called Gatekeeper, It’s designed to ensure that only trusted software runs on your Mac.If the software you are trying to open is not certified you will see a message like this “can’t be opened because apple cannot check it for malicious software.”.
- Ensure your Mac and all your apps are fully up-to-date: From the menu bar on your Mac, go to Software Update. Download and install any available updates to macOS. Now open the Mac App Store and select Updates from the sidebar. Download and install any available updates to your apps.
- Open a Mac app from an unidentified developer. If you try to open an app that isn’t registered with Apple by an identified developer, you get a warning dialog. This doesn’t necessarily mean that something’s wrong with the app. For example, some apps were written before developer ID registration began.
- When you install Syncios program on Mac OS 11 computer, you might see a message: 'Syncios' Can't be opened because Apple cannot check it for malicious software. When you try to right click Syncios and choose “Open” option, you might see a message: 'Protect.node' cannot be opened because the developer cannot be verified.
Note
Office 365 ProPlus is being renamed to Microsoft 365 Apps for enterprise. For more information about this change, read this blog post.
Symptoms
When you try to start Microsoft Excel for Mac, you receive the following error message:
Microsoft Excel has encountered a problem and needs to close. We are sorry for the inconvenience.
Cause
This error may occur if one of the following conditions is true:
- The Excel preferences are corrupted.
- Programs that are running in the background are interfering with Excel for Mac.
- Application files are corrupted.
- A user account profile is corrupted.
Resolution
To resolve this issue, try the following methods, in order, until the issue is resolved.
Method 1
Step 1: Quit all programs
You must quit all programs before you continue. To quit an application, select the application on the toolbar (top), and then select Quit. If you cannot quit an application or do not know how, hold down the Command and Option keys, and then press Esc on your keyboard. Select the application in the 'Force Quit Application' window, and then select Force Quit. Click Force Quit to quit the application.
When you are finished, click the red button in the upper-left corner and go to step 2.
Step 2: Remove your Excel preferences
Quit all Microsoft Office for Mac applications.
On the Go menu, click Home.
Open Library. Note The Library folder is hidden in Mac OS X Lion. To display this folder, hold down the OPTION key while you click the Go menu.
Open Preferences.
Drag com.microsoft.Excel.plist to the desktop. If you cannot locate the file, Excel is using the default preferences. Go to step 7.
Open Excel, and check whether the problem still occurs. If the problem still occurs, quit Excel, restore the file to its original location, and go to the next step. If the problem is resolved, drag com.microsoft.Excel.plist to the Trash.
Quit all Office for Mac applications.
On the Go menu, click Home.
Open Library.
Note
The Library folder is hidden in Mac OS X Lion. To display this folder, hold down the OPTION key while you click the Go menu.
Open Preferences.
Open Microsoft, and then drag com.microsoft.Excel.prefs.plist to the desktop. If you cannot locate the file, Excel is using the default preferences. Go to step 13.
Open Excel, and check whether the problem still occurs. If the problem still occurs, quit Excel, restore the file to its original location, and go to Method 2. If the problem is resolved, drag com.microsoft.Excel,prefs.plist to the Trash.
Method 2
Use the 'Repair Disk Permissions' option
You can use the Repair Disk Permissions option to troubleshoot permissions problems in Mac OS X 10.2 or later versions. To use the Repair Disk Permissions option, follow these steps:
- On the Go menu, click Utilities.
- Start the Disk Utility program.
- Click the primary hard disk drive for your computer.
- Click the First Aid tab.
- Click Repair Disk Permissions.
Note
Mac Software Cannot Be Opened Because It Is From An Unidentified Developer
The Disk Utility program only repairs software that is installed by Apple. This utility also repairs folders, such as the Applications folder. However, this utility does not repair software that is in your home folder.
Open Excel and check if the issue is resolved. If it is not, continue to Method 3.
Method 3
Create and use a new user account
To create a new user account, use the following procedure.
Note
You many have to reinstall Office if you log on with a new account.
Click the Apple icon, and then click System Preferences.
Click Accounts.
Click the plus sign ('+') in the lower-left corner to open the new account window.
Note
If you are not the Administrator of the computer, click Click the lock to make changes. Log on by using your Administrator user name and password, and then click OK.
Type the word Test for the user name, and leave the password box blank. Click Create Account. When you receive a warning, click OK.
Click to select Allow User to Administer this computer. (If this option is not available, just go to the next step).
Click the Apple icon, and then click Log Out name.
Log on with your Test account.
Mac Software Cannot Be Opened As A
Open Excel and check if the issue is resolved. If you can save when you use a new user account, contact Apple support to troubleshoot your existing account. If you do not want to keep your existing account, you can rename the 'Test' account that you create in the following procedure, and continue to use that account. If it is not, continue to Method 4.
Method 4
Remove and then reinstall Office
For information about how to remove and then reinstall Office, see the following article:
Third-party information disclaimer
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
Third-party contact disclaimer
Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
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Some Mac users say that they can't download programs from other website except Mac App Store, or they may can't be opened the download file. When they click on the download file, it says 'xxx can't be opened because it is from an unidentified developer'. For example:
If you are facing this problem while you are downloading & installing DoYourData Software, you can follow these simple steps to solve this issue.
Step 1: Click 'Launchpad' --> Find 'System Preference', and Open it --> Click 'Security & Privacy'.
Step 2: Change the setting, enable your Mac can download from 'Anywhere'.
If you have upgraded your Mac to macOS 10.12 Sierra or higher, you just click 'Open Anyway', like this:
Step 3: Re-download the software or re-open the download file on your Mac. Then install it on your Mac, you can follow this guide: http://www.doyourdata.com/support/product/mac/install-and-activate-mac-software-doyourdata.html
DoYourData Mac software are 100% safe and clean. If you have any question, feel free to contact us by sending an email to [email protected].
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