App can t be opened because it is from an unidentified developer

Question

I installed Mac OS X Mavericks  10 9  yesterday and since then I am not able to start my Eclipse  I am attaching a screenshot of the message I see   Is there a workaround for this     I found a solution in Fix the    App can   t be opened because it is from an unidentified developer    Error in Mac OS X

User · Answer

Open terminal  go to extracted folder of eclipse and run the following command     eclipse -clean

User · Answer

I had got the same error   Because of security reasons  I could not see option for allowing Apps downloaded from Anywhere in System preference-  Security Tab   I removed the extended attribute from Zip file by below command   xattr -d com apple quarantine  Zip file path     And then got below error - org eclipse e4 core di InjectionException  java lang NoClassDefFoundError  javax annotation PostConstruct  Resolved it by uninstalling all different versions of java and installed just 1 8 0 231   Worked finally

User · Answer

It is prohibiting the opening of Eclipse app because it was not registered with Apple by an identified developer  This is a security feature  however  you can override the security setting and open the app by doing the following    Locate the Eclipse app  eclipse Eclipse app  in Finder   Make sure you use Finder so that you can perform the subsequent steps   Press the Control key and then click the Eclipse app icon  Choose Open from the shortcut menu  Click the Open button when the alert window appears    The last step will add an exception for Eclipse to your security settings and now you will be able to open it without any warnings   Note  these steps work for other   app apps that may encounter the same issue

User · Answer

Open Terminal  Go to the eclipse folder  Run   eclipse

User · Answer

Terminal type   Last login  Thu Dec 20 08 28 43 on console      sudo spctl --master-disable Password       spctl --status assessments disabled        System Preferences- Security  amp  Privacy

User · Answer

I had the same problem  Eclipse would not start  Found this link and it worked like a charm   Can  39 t click Menu Bar Items in Eclipse  Java is messed-up on Maverick  need to download and install from here  http   support apple com kb DL1572 viewlocale en US amp locale en US

User · Answer

you can modify the gatekeeper settings by running the following command  To disable to allow apps from anywhere to be installed use the following command in terminal        sudo spctl --master-disable   To re-enable use the following command     sudo spctl --master-enable

User · Answer

It s because of the Security options   Go to System Preferences     gt  Security  amp  Privacy and there should be a button saying Open Anyway  under the General tab   You can avoid doing this by changing the options under Allow apps downloaded from   however I would recommend keeping it at the default Mac App Store and identified developers

User · Answer

You can also use the xattr command as in Stack Overflow question How do I remove the  extended attributes  on a file in Mac OS X    Just remove the com apple quarantine attribute  It works even if you don t have an administrator account  which can be a plus  After that  the app isn t considered  downloaded  and is therefore not blocked

User · Answer

Right-click  or control-click  the application in question and choose  Open

User · Answer

Right click   Open   Or  you can go into System Preferences  Security  amp  Privacy  and set the restrictions on opening apps there

User · Answer

Control Click the application in the Applications folder  not lauchpad  Choose open and then you get  an options to actually open it

User · Answer

An easier way to open a document from an unidentified developer  if you know it s safe  is to control-click on the file icon and then select  Open   You will then be given the option of opening it regardless of its unidentified source

User · Answer

In terminal type the command   xattr -d com apple quarantine  file path here    Once you click enter it will no longer have that problem  Its annoying that apple adds a quarantine to files automatically  I do not know how to turn this off but there probably is a way

User · Answer

Try looking into Gatekeeper  I am not sure of too much Mac stuff  but I heard that you can enable it in there

[eclipse] App can't be opened because it is from an unidentified developer

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