This week in the MacNN forums, a discussion about the effects of cold on a computer was brought about after one Senior User recounted the tale of how their MacBook Air recently froze and was subsequently resurrected. One Mac Enthusiast plans on upgrading the SSD that originally came with their 27-inch iMac to a more modern SSD in hopes that the newer drive will provide a boost in performance, some members disagree that this will help, join in here.