After upgrading to OS X 10.9.5, SimUText reports "developer cannot be identified" when app is launched

Apple has released Mavericks version 10.9.5, which has newer and stricter Gatekeeper requirements for developers building applications that will be released for web download, like SimUText.

Users who upgrade their systems to 10.9.5 may find that the next time they run a recent version of SimUText (2.2.3), the system reports a message indicating the program "can't be run because the developer cannot be identified". (The condition that displays the message depends upon whether you had already installed and launched SimUText before upgrading to 10.9.5, or you had a 10.9.5 system and then downloaded SimUText.)

The version of SimUText you can obtain from is safe to run. Version 2.2.3 is not compliant with Apple's requirements for the Gatekeeper utility in 10.9.5, which has been improved to provide better security against downloadable programs on the Mac platform. 

A new version, 2.2.4, is now available as the default version on for Mac users.

You CAN still run 2.2.3 if you follow the directions in the message dialog box when you try to launch SimUText. (Hold down the Control button on your keyboard, click the app to open the context menu, and then select the Open command. When prompted, allow the SimUText app to run.)

An automated update to version 2.2.4 of SimUText (from any earlier version released since mid-2014) is also available and is recommended for all users on the Mac platform.

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