After upgrading to macOS Catalina, some mac users found that some apps can’t be opened because Apple cannot check it for malicious software. A dialog box pops up, click 'OK' button and the application will close. Solution: Make sure you have dragged the installer package to /Applications to complete the installation. Our users have found that. 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.

1. Mac Software Cannot Be Opened
2. Mac Software Cannot Be Opened Using
3. App Cannot Be Opened Mac Malicious Software

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.”

Open a terminal. Here are the commands: cd. Cd Applications. Cd APPLICATIONNAME.app (where APPLICATIONNAME is your app) cd Contents/MacOS. First Option (if you know which is the executable): chmod +x FILENAME (where FILENAME is the name of the executable) Second Option (if you don't know which is the executable): chmod +x. Ah yes, the dreaded “XXX can’t be opened because Apple cannot check it for malicious software” error!While it may seem like a huge annoyance, it’d actually beneficial because Apple is helping ensure that random and potentially dangerous software doesn’t sneak its way onto your computer and then cause problems. “Origin” can’t be opened because Apple cannot check it for malicious software. This software needs to be updated. Contact the developer for more information. I don't know how to fix this, and can't find any similar issues.

Top Examples

• “mysqlworkbench” can’t be opened because apple cannot check it for malicious software.
• “sourcetree” can’t be opened because apple cannot check it for malicious software.

Note: Allowing apps to be installed manually brings potential risk from malware. Programs like Source Tree are legit, however try to make sure you are downloading the latest version of the software and from an authorized website before proceeding.

Bypass “Can’t be opened because apple cannot check it for malicious software.”

Most applications can be easily opened by this method:

Time Needed :2 minutes

“Can’t be opened because apple cannot check it for malicious software.”

1. Method 1

   System Preferences -> Security & Privacy -> click “Open Anyway”.

2. Method 2 – Right Click App

   Instead of double clicking on the app, just right click and press Open.
   You will get a notice “Can’t be opened because apple cannot check it for malicious software.” however you will still get the option to open the program

3. Method 3 “Works for Mac OS Catalina”

   Open “Terminal” App — Applications > Terminal. Use xattr to remove the app from quarantine. Source Reddit
   $ xattr -d com.apple.quarantine <app-path>

Materials

• Mac OS Catelina, Mojave and Older

Apple has removed the option allow all third Party Applications.

Since the release of the Mac OS Catalina apple has removed the option in the Security and Privacy settings to allow programs from “Anywhere” to be downloaded. From now on only individual programs can be given permission to be installed.

1. Why do I get the message “can’t be opened because apple cannot check it for malicious software.”

   Many programs have a notarization issue since the Catalina Update. Apple has tightened its privacy policies and has limited certification to apps only in the app store. Even though there are workarounds most users might feel an unease to install such programs.

Most Common “can’t be opened because apple cannot check it for malicious software.” Errors

• “java 8 update 251” can’t be opened because apple cannot check it for malicious software.
• “jdk 8 update 251.pkg” can’t be opened because apple cannot check it for malicious software.
• “sourcetree” can’t be opened because apple cannot check it for malicious software.
• “runescape” can’t be opened because apple cannot check it for malicious software.
• “mongodb compass” can’t be opened because apple cannot check it for malicious software.
• “mysqlworkbench”
• “Origin”
• “macperformance”
• “appium”
• “nox app”
• “install”

“mysqlworkbench” can’t be opened because apple cannot check it for malicious software.

“mysqlworkbench” refers to MySQL Work Bench is a legitimate program and it should not be considered malware. It is a unified visual tool for database architects, developers, and DBAs. MySQL Workbench also provides data modeling, SQL development, user administration, backup, and much more. MySQL Workbench compatible with most version of Mac OS X, including the latest version Mac OS 10.15.5

“sourcetree” can’t be opened because apple cannot check it for malicious software.

Sourcetree most definitely is not malicious. It interacts with your Git repositories and visualizes and manages your repositories through Sourcetree’s simple Git GUI. It is a Free Git client that is compatible with both Mac OS 10 and Windows 10. Make sure you have downloaded the latest version of SourceTree for Mac

“java 8 update 251” can’t be opened because apple cannot check it for malicious software.

“Java 8 Update 251” (8u251) refers to the latest version of Java 8.0. This is not malicious software however you cannot download the software from the app store therefore the pop up message will show up in all cases. If you are interested in what the latest updates includes you can check out the official update release for Java here.

mysql-8.0.21-macos10.15-x86_64.pkg

The latest MySQL package for mac is appearing to have the same problem. Installing it directly from the official MySQL page will still lead to the same message “mysql-8.0.21-macos10.15-x86_64.pkg” can’t be opened because apple cannot check it for malicious software.

Alternative messages

Mac Software Cannot Be Opened

Some users have been receiving a similar message “macOS cannot verify that this app is free from malware”. It is again related to gatekeeper technology where the application is not verified by apple. Many reputable applications have such a message when trying to install on a mac.

Cannot be opened because it is from an unidentified developer mac

In this case MacOS is not mentioning that this application is potentially dangerous. This is somewhat confusing as many unidentified developer apps for Mac do receive a message that it cannot be checked for malicious software. If you do however get this message you can still bypass and open the app with the same instructions above.

Do a reinstall, clean install, of Mountain Lion to its own drive - leaving the one you have as is. Would be nice to have cloned 10.6.8 to another drive for backup and safety, and in case you need to dual boot until you get everything updated if necessary to be ML compatible.

SU is Apple.

You have a Mac Pro 65 lb tower? so you would have 4 drive bays inside to work with backups and dual booting.

Mac Software Cannot Be Opened Using

Upgrading the OS over the older does cause issues, especially due to change in code and drivers and dropping support for PowerPC based and drivers that were not 64-bit.

App Cannot Be Opened Mac Malicious Software

http://www.macupdate.com/app/mac/7032/carbon-copy-cloner

Create an OS X Lion Install disc

How to clone your system:

May 8, 2013 11:12 AM