Okay, I did not see anything "bad" or malware on your system (but we will double check later with a different antivirus to put your mind at ease - you know, second opinion methodology).
First, I would like you to Reinstall Spotify
, log in, and see if the problem is resolved. If it is not, please go to step 2 below.
Second, please open Terminal as you did above, and place in the following command (similar as before, hitting enter to continue):
Once done, restart the Mac system immediately.
Once it has started up again, you will have to reconfigure a few system settings such as setting the time zone, setting the date and time, selecting the startup volume, and configuring any display options you wish to use. If you are having any troubles with that, please let me know and I will guide you through that. However, all of the options should be available in System Preferences (Apple).
If doing this has still not fixed the problem, then please answer questions in step 3 below, otherwise just post back and let me know progress please.
Okay, so step 3:
-Did you have issues before or after you installed any one of the following two apps:
-Are you using a Apple/Mac certified mouse? Is it wired or wireless?
-What is the age of the Mac you are currently using (when did you buy it and how many times has it upgraded the operating system)?
Thanks for your patience... Hopefully we are getting closer to resolving this!