Open source software that isn’t signed by an identified developer can cause headaches upgrading it on OSX. While working with the Arduino Due the first time, I downloaded 1.5 Beta of the Arduino IDE and ran into this error:

“Arduino is damaged and can’t be opened.  You should move it to the Trash.

Here’s why you see the “… is damaged and can’t be opened” dialog and how to fix it.

Cathode from Secret Geometry is, hands down, my favorite Terminal Emulator for OSX.  It is, in my opinion, (near?) perfect emulation of classic computer terminals from the 1980s.  When using it, it reminds me of how far computers really have come.  It is also one of the funnest ways to ssh into a remote host to edit a CSS file real quick. I like keeping mine set to 14.4k baud emulation.  The screen blur, when running…