I use a Macbook Air 2013 and I recently noticed a very strange and long line of
ID: 660066 • Letter: I
Question
I use a Macbook Air 2013 and I recently noticed a very strange and long line of digits and letters under my "shared" category in finder. When I click on the name, it just says "failed to connect." It has a picture of a PC next to the name.
In addition, when my computer goes into sleep mode the screen saver says "test's macbook air" and I never set it to this. Has someone hacked me to "test" their aptitude?
I am not very experienced with this sort of thing and I am slightly worried and taken off guard.
Explanation / Answer
To answer your 1st question, under the shared category in the finder, you will see any hosts on your network with file sharing enabled. This is normal behavior.
Regarding your name showing up as 'test', in system preferences, under User Accounts, check to make sure that the correct Username is showing up. Did you set up this account? Also, under 'Sharing', check to see if any of the File Sharing or Remote Access features are enabled. Unless these are enabled, no other hosts on your network should have been able to access your machine, unless they are exploiting a vulnerability.