By default Apple has changed the security settings to only allow installation of apps from the Mac App Store and identified developers. This causes an issue with the mccPILOTLOG installer package.
To change this permanently or temporarily go to Mac OS > System Preferences > Security & Privacy. On the General Tab click the little lock in the lower left corner to unlock the general preference pane. Then select the "Mac App Store and identified developers" or the "Anywhere" radio button, as shown here :
If you choose the "Anywhere" option, the installer package can now be executed. If you select the "identified developers" option, continue as follows :
1) Right-click (*) on the mccPILOTLOG Installer Package.
(*) that’s a two-finger click on a Macbook trackpad, a Control-click on a single button mouse, or the actual right mouse button on a multi-button mouse.
2) Choose Open in the pop-up menu
3) Choose Open on the resulting dialog box
It will tell you that the app you’re trying to open is from an unidentified developer. Once you choose to Open it this way, the app will no longer trigger a Gatekeeper warning.
Additional Background Information :
MCC does not have an official Developer ID for Mac, since we develop cross-platform Mac/Windows. We have an official Developer ID for iOS apps (iTunes), but not for Mac OS desktop. In order to install the application, you need to modify the Gatekeeper options. Read this article on the official Apple website :