Apple is planning to introduce additional user protection to the current OS X Mavericks and OS X Yosemite, which will be released this fall. Developers already have to have their applications signed with a company certificate some Friday Appleso that they can be included in Mac App Store. However, recently Apple will require all developers whose apps are signed on a version of OS X earlier than OS X 10.9 to re-sign with a certificate, otherwise Gatekkeper will mark them as unsigned apps.
Pro This will be a problem for users, especially if they use applications downloaded from outside Mac App StoreAll applications that were developed on an operating system older than OS X 10.9, or were signed for an older operating system, will have to be signed by developers.chat re-approve Applem. Apple has already invited developers to submit their apps for signing again, which will make the apps included in the list Gatekeeperua will allow them to run. However, there is an easy solution for the user, all you have to do is open the application using the context menu by right-clicking on it and selecting the open option, then it doesn't matter whether the application is signed or not.
*Source: 9to5mac.com
