1. download the new OS
2. you install MCC, this might update first then
3. then you connect the MB via USB
4. MB will get detected and MCC popup will tell you NEW OS AVAILABLE
5. you confirm to upgrade the OS, localize it on your hd
6.upgrade starts. at a certain point it stops. you have to reboot the MB then . you wait a few seconds THEN press ok.
7. upgrade resumes. you reboot the MB again.
8. you feel great, big smile, hug the world
9 your neighbours will knock on door begging you to raise the volume as the MB just sounds so good