Encountering the “Can’t Be Opened Because Apple Cannot Check It for Malicious Software.” warning indicates that macOS could not verify the application’s safety.can be alarming, especially when you downloaded an application directly from a developer and expected it to work normally.
The key takeaway is that this warning on its own doesn’t mean the app you’re trying to run is malware. Instead, what it’s telling you is that macOS can’t perform its usual integrity checks, which it uses to establish trust. Apple suggests verifying the integrity of the app through its source and reaching out to the developer, and says that bypassing your security setting should only be done when you’re sure of the software’s integrity.
And that distinction is important. For a third-party app that is not running here, simply clicking past the warning can be a security risk, but deleting every app that you get a warning about can also prevent you from running trusted software outside the Mac App Store.
This guide explains can’t be opened because Apple cannot check it for malicious software., Why macOS is showing it, what it is, how Gatekeeper functions, what to verify before opening the app, what to do when Open Anyway appears, and when to quit trying to bypass the warning.
What Does the “Apple Cannot Check It for Malicious Software” Warning Mean?
When you see can’t be opened because Apple cannot check it for malicious software., macOS is essentially saying that it cannot verify the application through its normal security checks.
If you have installed software from outside the Mac App Store, it is checked by Gatekeeper and other security features in macOS to determine if it is from an identified developer, has been properly notarized, and has not been modified.
Therefore, the warning is better understood as a verification problem, not a direct malware diagnosis.
For example, you get a utility from a software company’s website that is, say, related to a niche industry they cover. The software may not be harmful, but it can still cause an alert because of how it was released, notarized, distributed or packaged.
On the other hand, an application downloaded from an unknown website deserves much more caution.
Does the Warning Mean the App Is Malware?
No. The message does not establish that the application is malicious.
However, the opposite is also important: the warning does not prove that the application is safe.
Apple recommends that you verify the software publisher or developer, download the latest version from the App Store, contact the developer, or try an alternative. If you are confident that the software is from a trusted source and has not been altered, then you can do this by temporarily overriding your Mac’s security settings.
That means your decision should depend on the application’s source and circumstances rather than the warning alone.
Why Does macOS Show This Warning?
There are several reasons you might encounter can’t be opened because Apple cannot check it for malicious software.
The App Was Downloaded Outside the Mac App Store
Many genuine Mac apps are available for download directly from the developer’s websites. Apple endorses such methods of distribution with Developer ID signing and notarization.
So, simply downloading an app from the web doesn’t necessarily make it suspicious.
That is what is happening when software is being installed from sources other than the App Store, as such applications may need to be verified before they are executed by the Mac OS.
The App Is Not Notarized
Apple’s notarization service scans Developer ID-signed software for malicious content and code-signing security checks. Once it passes the checks, Apple returns a notarization ticket that Gatekeeper can use when verifying the software.
Some legacy apps or apps obtained through less traditional means might not have the expected notarization information.
The Software Has Been Changed
Another feature in Gatekeeper is the ability to verify whether a downloaded program has been modified.
An original application when it was created could have an alternate security outcome if its content was altered in any manner after it was signed, Apple explains. Gatekeeper uses software to determine if an application has been modified.
This is the only reason that sometimes downloading the app again from the developer’s website is a little bit more useful than continuously seeking to bypass the warning.
The Developer Uses Direct Distribution
Not every legitimate Mac application is available through the Apple App Store.Self-Distribution Developers are able to implement Developer ID signing and notarization. Apple’s own documentation makes it clear that this is an allowed distribution method.
Consequently, can’t be opened because Apple cannot check it for malicious software. It should not be taken to mean that every application downloaded from outside the App Store is unsafe.
Gatekeeper, Developer ID, and Notarization Explained
By grasping these three terms, the warning makes a lot more sense.
Gatekeeper is a security feature that assesses downloaded apps and software components.
Developer ID is a certificate used by Apple to sign developers who distribute Mac software outside the App Store.
Gatekeeper is designed to recognize the developer and check the software’s integrity if a Developer ID signature is present.
Notarization is the automated system Apple uses to scan software submitted by developers for malware before it’s distributed. Apple says the notary service scans the software for malicious content and code-signing issues and that a ticket is returned when the submission has been notarized, which Gatekeeper can then use to verify the software.Notarization and App Review are two separate processes with different purposes.
This is why the message pops up even when the developer is trustworthy: it’s not a problem with the developer, but the app’s security label.
Is the App Safe to Open?
Before trying to ignore can’t be opened because Apple cannot check it for malicious software., evaluate the source.
Ask yourself:
- Did I download it from the developer’s official website?
- Was I expecting to install this application?
- Does the developer provide documentation for this specific release?
- Is there a newer version available?
- Does the developer explain the macOS compatibility requirements?
- Did I download the original installer rather than a modified copy?
- Does the application name match what I expected?
Consider two scenarios.
Scenario 1: You downloaded a popular app from the developer’s website and you see this message: The developer’s support page for the version of the app you downloaded says it supports your macOS release.
Scenario 2: You stumbled upon a hacked version of an app from an unknown app store because it was being promoted as the free version of the paid app.
The warning may look identical, but the surrounding risk is very different.
A Simple Decision Guide
| Situation | What to do |
| Official developer website | Verify the release and developer information first |
| Mac App Store version available | Consider using the App Store version |
| Unknown download website | Avoid opening it |
| Unexpected application | Do not bypass the warning |
| Developer provides a newer release | Download the current version |
| Application appears modified or unofficial | Do not open it |
| Trusted developer confirms the warning | Follow the developer’s current support guidance |
The goal is not simply to find a way around the warning. The goal is to determine why macOS cannot verify the software and whether you have enough reason to trust it.
How to Fix the “Can’t be opened because apple cannot check it for malicious software.” Error
If you have verified the application and believe it is legitimate, macOS provides a normal security workflow for handling certain blocked applications.
1. Try Opening the App Normally
First, launch the application in the normal way.
If macOS displays can’t be opened because Apple cannot check it for malicious software., don’t immediately start changing system-wide security settings.
Read the warning carefully and confirm that it is the application you intended to open.
2. Check Privacy & Security
In recent versions of macOS, you can find these controls under System Settings > Privacy & Security.Open Anyway button When an app is blocked, macOS may show the Open Anyway option here. Apple describes this workflow for apps that appears with various security warnings.
The key order is to try the launch first and then verify the security.
3. Use “Open Anyway” Only After Verifying the Source
If Open Anyway is available, it is not a certificate saying that Apple has declared the application safe.
It is a user override of the normal Gatekeeper decision.
That distinction is crucial.
Apple recommends using an override only when you trust the app’s source and are confident that it has not been altered or compromised.If you’re unable to verify those facts, don’t override just for the application’s sake.
What If “Open Anyway” Does Not Appear?
If you’re looking to bypass Can’t be Opened because Apple cannot check it for malicious software and Open Anyway can’t be found, don’t assume macOS is busted.
First, make sure that you actually tried to open the same program and received the alert.
Then check System Settings → Privacy & Security again.
If the option still does not appear, consider these possibilities:
- The warning is different from the one you think you received.
- The application was moved, replaced, or downloaded again.
- The application has another compatibility or security problem.
- The current macOS version is handling the software differently.
- The developer has released a newer version.
At this point, downloading the latest version from the official developer is often a better troubleshooting step than repeatedly trying to override macOS security.
What If the App Still Won’t Open?
Sometimes can’t be opened because Apple cannot check it for malicious software is not the only issue.
Download a Fresh Copy
If you obtained the application from the official developer, download it again rather than relying on an installer that may have been incomplete or modified.
Avoid third-party download sites when the developer provides an official download.
Look for a Newer Version
An obsolete app may break in a later version of macOS.
Verify the developer’s current system requirements and release notes. If a newer version exists, it would be better to install that one instead of constantly patching the older version to get it to open.
Check for a Different macOS Warning
If the message changes to something such as “app is damaged”, “developer cannot be verified,” or a compatibility-related message, you may be dealing with a different problem.
Each warning has a different meaning, so applying a generic Gatekeeper workaround may not solve it.
Apple Cannot Check It vs Other Mac Security Warnings
These messages are easy to confuse, but they are not identical.
| Warning | What it generally indicates | Sensible first step |
| Apple cannot check the app for malicious software | macOS cannot establish the expected malware-verification assurance | Verify source and developer |
| Developer cannot be verified | macOS cannot establish the expected developer identity/trust relationship | Check official source and current version |
| App was downloaded from the Internet | macOS is requesting confirmation before first launch | Confirm you expected the download |
| App is damaged | The application may have integrity, signing, compatibility, or other problems | Re-download from the official source |
| App is incompatible | The software may not support your macOS or hardware | Check developer requirements |
The exact behavior can vary with the macOS release and the application’s security properties, so focus on the actual message displayed by your Mac rather than applying one universal fix.
Should You Disable Gatekeeper?
Some troubleshooting guides recommend disabling Gatekeeper or making broader changes to macOS security settings.That should not be your first approach.
Gatekeeper is designed to defend you from untrusted Mac software. According to Apple’s own security docs: Gatekeeper, notarization, and other safeguards combine to make malware less likely to reach your Mac.
There should be no need to weaken your overall security settings just to allow a single application to run.
A safer troubleshooting order is:
Verify the source → check for an updated version → check the developer’s documentation → retry the normal launch → use Apple’s documented override only when appropriate.
This approach also helps you avoid turning a single application problem into a broader system-security problem.
Why Legitimate Apps Can Still Trigger the Warning
It is tempting to think that a security warning means the developer has done something wrong.
That is not always true.
A valid application might not open because Apple cannot check it for malware since it has not been downloaded from the internet because it is distributed directly by its developer due to an older distribution method due to an application that hasn’t been notarized due to it not having the proper notarization information due to it not satisfying the typical verification route.
Apple allows software to be distributed outside of the Mac App Store, but specifically provides Developer ID and notarization for that software.
Therefore, the correct question is not simply:
“Does macOS show a warning?”
It is:
“Why is macOS showing this warning, where did this application come from, and can I independently verify that source?”
When You Should Not Ignore the Warning
There are situations where the safest choice is to stop.
Do not bypass the warning simply because:
- The application came from an unknown website.
- You were not expecting to download it.
- Someone sent you an unexplained installer.
- The application is advertised as a modified or unofficial version.
- The developer cannot be identified.
- The developer’s website does not list the application.
- You cannot find trustworthy information about the software.
- A newer official version is available.
- The download source appears suspicious.
The warning is particularly important when you cannot establish where the application came from.
Apple itself advises caution with software that triggers security alerts and recommends checking the App Store, contacting the developer, or finding an alternative.
How to Prevent the Warning in the Future
You cannot guarantee that you will never encounter a Mac security warning, but you can reduce unnecessary problems.
Download applications from the official software sources whenever possible.
Keep macOS and your applications updated.
The other good way to ensure that your downloaded software is legit is to go directly to the developer and check their support site and use their latest version.
Also, avoid repacked applications from unauthorized download sites. Third party copies might not offer similar security guarantees, even if the application originated from a reliable developer.
Additional layers of protection, such as Gatekeeper, Notarization, and malware protections, including XProtect, all work together to make up the macOS security model.
Frequently Asked Questions
1. Does “Apple cannot check it for malicious software” mean my Mac has a virus?
No. The warning alone does not mean that your Mac has a virus or that the app is malware. It just means that macOS is unable to provide the usual assurance when verifying that app. You should still verify the app’s source before deciding whether to open it.
2. Is It Safe to Ignore the “Can’t Be Opened Because Apple Cannot Check It for Malicious Software” Warning?
For application developers: If you’ve verified that a version of your software is safe, you can usually overrule the warning. Apple makes it clear that you should only overrule it “if you are confident that the application came from a trusted source and has not been altered in any way”.
3. Where is Open Anyway on a Mac?
On supported versions of current macOS, try opening the blocked app first, then go to System Settings → Privacy & Security to review the available options.An Open Anyway option may appear for certain warnings.
4. Why Would Apple Block an App From a Developer I Trust?
Permissioned access isn’t the same as trusting all copies. Even if you trust the developer, other factors can influence Gatekeeper’s judgment: signing, notarization, app integrity, software distribution, and the versions of macOS you’re using.
5. Is downloading an app outside the Mac App Store unsafe?
Not necessarily. Apple supports direct distribution by developers using Developer ID and notarization. However, downloading from outside the App Store means you should pay particular attention to the developer, source, and integrity of the software.
6. Why did the warning appear after I downloaded an app from the Internet?
MacOS considers downloaded software that requires further analysis before its initial launch. Gatekeeper evaluates software downloaded from outside the App Store to verify the presence of appropriate trust and integrity attributes and prompts for user confirmation.
7. Should I turn off Gatekeeper to open one application?
Generally, changing system-wide security protections should not be your first troubleshooting step. First verify the application, look for a current release, and use Apple’s documented security workflow where appropriate.
Conclusion
The warning “Can’t Be Opened Because Apple Cannot Check It for Malicious Software.” may appear when macOS cannot verify an application.is best treated as a security verification warning rather than an automatic malware diagnosis.
A valid application may hit this warning, especially if it is not distributed via the Mac App Store or doesn’t follow the usual notarization and verification process. However, that warning should never be used as a reason to assume an unknown app is safe.
First, verify where the application was downloaded from, whether it’s the official and current release, and whether the developer provides an explanation for the warning. If you’ve confirmed the source and the relevant Open Anyway option is presented by macOS, you can decide whether to proceed, instead of ignoring the controls indiscriminately.
If you don’t know where the app came from or have any reason to trust it, don’t open it. There’s an even better option more often than not: get the latest version straight from the developer.
Understanding the “Can’t Be Opened Because Apple Cannot Check It for Malicious Software.” warning can help you determine why macOS has blocked the application.It helps you solve the immediate problem without losing sight of the larger goal: keeping your Mac and personal information protected.
