Tails 2.5 and Tails 2.6 were OK. Tails 2.7 boots from a USB stick as usual, and things appear normal, but Tor-browser will not launch when I click its icon. It will not launch when I click links, as in GNOME help, in Whisperback, in liferea (spelling?). Is it just me, my old Mac, or something else, given the following possible clues?
According to messages in dmesg, something appears to be crashing at the same memory address and generating many lines of similar messages. Sorry, most of it is over my head and I have not saved it, yet. I will update this post with all or part of dmesg text after the next Tails session.
Some things appear to work (GNOME Help, Liferea, Whisperback, perhaps others), yet no matter what I try, Tor-browser will not start. I await download of a new copy of the .iso as I type.
Thanks in advance for any help.