App can't be opened because it is from an unid

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.

Answer 1

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

Answer 2

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

Answer 3

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.

Answer 4

It's because of the Security options.

Go to System Preferences... > Security & 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.

Answer 5

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

Answer 6

Right click > Open.

Or, you can go into System Preferences, Security & Privacy, and set the restrictions on opening apps there.