In a previous post CryptedHelloWorld: App with encrypted mach-o sections, I created a simple macOS app CryptedHelloWorld with its (__TEXT, __text) section encrypted. The section is decrypted by a constructor function.
This post explains how to dump the decrypted app. A common way is to attach the app with a debugger (GDB, LLDB) and manually dump the decrypted memory to disk.
OS X 10.11 ‘El Capitan’ added a new feature to Mail.app Swipe to manage your inbox:
Swipe to manage your inbox.
Now you can take care of your email with a swipe, just like on your iOS devices. Need to triage your inbox? Swipe right to mark an email as read or unread, or swipe left to delete. You’ll be focused on what’s important in no time.
I find this new feature extremely annoying as I keep triggering it by accident. Sadly it seems that there is no preference (even secret preference) to disable this feature. But the good news is that Mail.app supports plugins.