I have a photo of the original screen I found and can provide screenshots of the addresses and ports that the firewall has blocked, if those would be useful.ġ. I'd be grateful for any advice that people could share on what might have caused this and, if it is a virus/trojan, how I can rid myself of it, given the two antivirus apps I've tried so far cannot detect it. So far it has only blocked connections inbound from addresses on my home network blocked outbound connections are all internal too, with the exception of one to my cloud backup service and 20 to and external IP that turns out to be my ISPs DNS hijack service.ĭoing a search on 'llib' and 'gdb' tells me that they are debugging tools but I can't establish what the command above was trying to achieve (my shell scripting days were long ago!). The firewall in System Preferences was already enabled prior to all of this but I've also installed Murus to configure the PF firewall, with logging enabled. I've run full scans using Avira and Malwarebytes but neither have found any signs of infection. My first thought was that the laptop has been infected with a virus or trojan somehow. I selected 'Not Now' on the Xcode dialogue and, looking at the Terminal command line history, this was the only command that had been run since the last one I had run a few days before. Lldb -s <(echo 'gdb-remote localhost:63692')

This seems to have been triggered by a command on the foremost Terminal window:

The 'lldb' command requires the command line developer tools. I left my MacBook Pro for a few minutes at the weekend and returned to find two open Terminal windows and an Xcode dialogue box on the desktop, which were not previously there.

How to install gdb in macbook pro os x