fix the port selfupdate in Mac OS X 10.8

This is a FAQ in Macport :
https://trac.macports.org/wiki/FAQ#selfupdatefails
If your connection to the rsync server fails you may get blocked by a firewall or other network control software. In the new system of Mac, you can stop the service as the image. This new security feature is called GateKeeper. It will also stop you for install other software.















From:http://osxdaily.com/2012/07/27/app-cant-be-opened-because-it-is-from-an-unidentified-developer/

You can use the same method to install your new software. Also just right click the install files and choose open. There will be a window asking you "Are you sure ?". Just answer YES!

Fix the “App can’t be opened because it is from an unidentified developer” Error in Mac OS X

Jul 27, 2012 - 33 Comments

Since OS X Mountain Lion, the Mac defaults to preventing applications from unidentified developers or sources from being launched. You’ll discover the message in OS X 10.8 when you try to launch a Mac app that didn’t come from a verified source or from the Mac App Store, and you’ll get an alert dialog that says “[App name] can’t be opened because it is from an unidentified developer”.

This new security feature is called GateKeeper, and it doesn’t mean you can’t run those unverified apps on the Mac, you just have to either temporarily skirt the security blanket of GateKeeper, or turn off the app limitations entirely.

Temporarily Get Around “App Can’t Be Opened” Gatekeeper Alert Message

This is probably the best option for most users, since it maintains some security:

1. Right-click (or control-click) the application in question and choose “Open”
2. Click the “Open” button at the next dialog warning to launch the app anyway

You can do this with any third party app that gives you this warning dialog and open it anyway.

If you get tired of constantly right-clicking apps to open them, return to pre-Mountain Lion levels of app security by turning off Gatekeepers app verification completely.

Disable GateKeeper’s Unidentified App Developer Prevention Completely

This is generally best for advanced users who know what apps to trust and not to trust:

1. Launch System Preferences from the Apple  menu
2. Choose “Security & Privacy” and then click the “General” tab, followed by clicking the lock icon in the corner to unlock the settings
3. Look for “Allow applications downloaded from:” and choose “Anywhere”
4. Accept the security warning and allow
5. You can now launch any app from any location or developer