I am very happy that Node.js 4.0 is available and the project has been merged with IO.js. Also, it has the LTS support similarly to Ubuntu. However, when I install the .pkg file on my Mac 64 bit at work, I suddenly got “segmentation fault” error message for my app. It seems like a C++ memory error. So, I need to stick with the old working version which is v0.12.7. I am scared to upgrade it on my live Ubuntu now.