Mac hacked??? I have strange new apps in my dock!!

Issue 1: Safari downloads "safe" files automatically by default, and will even automatically take action on them.

To turn this off, open Safari, select Safari->Preferences... and under the General tab (the default one), uncheck the checkbox at the bottom titled "Open 'safe' files after downloading."  This won't stop files from automatically downloading, but it will stop them from automatically doing anything bad.

Issue 2: You can find Terminal.app in your /Applications/Utilities/ folder.  It is likely this somehow was dragged to your dock.  Malicious software doesn't tend to draw attention to itself by adding items to the dock.

If it is only in the dock because it is running (likely the case), take a look at the white window with a bunch of text on it displayed within Terminal.app -- if it says anything you don't understand, copy the text and paste it in here, and someone should be able to tell you if it's safe or not.

If you've already closed Terminal.app, you can still track what has happened using Console.app, but it involves going through a few log files that record the activity on your computer to figure out what happened.

Issue 3: Strange calls with a "press one now" command are common in North America, as there are scam operations running that use automated systems to set up the scam and attempt to collect your personal info.  These are generally not connected to anything computer-related, except for the ones pretending to be Microsoft/the FBI/a computer help technician that ask you to install software on your computer and give them your personal info to fix a "problem" they've found on your computer.

Hanging up is always the best solution to these; if you get a lot of them, make sure to report them to the local authorities.  You can also get automatic call screening for your phone, which will block out robocalls and telemarketers.

Issue 1: Safari downloads "safe" files automatically by default, and will even automatically take action on them.

To turn this off, open Safari, select Safari->Preferences... and under the General tab (the default one), uncheck the checkbox at the bottom titled "Open 'safe' files after downloading."  This won't stop files from automatically downloading, but it will stop them from automatically doing anything bad.

Issue 2: You can find Terminal.app in your /Applications/Utilities/ folder.  It is likely this somehow was dragged to your dock.  Malicious software doesn't tend to draw attention to itself by adding items to the dock.

If it is only in the dock because it is running (likely the case), take a look at the white window with a bunch of text on it displayed within Terminal.app -- if it says anything you don't understand, copy the text and paste it in here, and someone should be able to tell you if it's safe or not.

If you've already closed Terminal.app, you can still track what has happened using Console.app, but it involves going through a few log files that record the activity on your computer to figure out what happened.

Issue 3: Strange calls with a "press one now" command are common in North America, as there are scam operations running that use automated systems to set up the scam and attempt to collect your personal info.  These are generally not connected to anything computer-related, except for the ones pretending to be Microsoft/the FBI/a computer help technician that ask you to install software on your computer and give them your personal info to fix a "problem" they've found on your computer.

Hanging up is always the best solution to these; if you get a lot of them, make sure to report them to the local authorities.  You can also get automatic call screening for your phone, which will block out robocalls and telemarketers.