With the reminder I'm not a Mac person and so may be wrong, it looks like the ssl library on your machine is is either too old (if this is an older OS) or too new (which is less likely). In turn if ssl isn't working then Fritzing won't be able to connect to github to get parts updates and will likely hang. Is OSX 10.7.5 an older release (I'm guessing it is from the "I fired up my old Macbook" in which case there may not be a solution other than to upgrade the OS (if that is possible).
Peter