Replacement developer certificates Apple issued to fix security issues have caused signed packages created using the older replaced certificates to no longer be verifiable. This results in OS X assuming corruption in these files, and will not process them by default. One unfortunate side-effect of this is that older installers you may have collected for past versions of OS X will likely have been signed using older certificates, and may no longer install. Continue reading
Sometimes you might try to run a program or two on your Mac, and encounter a message that states you need to install the command line developer tools. The message will then have options to install the tools, cancel the request, or get Apple’s XCode software package.
If you encounter this warning, you may wonder Continue reading