Arduino Uno "error 1" on Mac

I am new to Arduino so I purchased the Arduino Uno 1.8.0. I am using Mac OSX 10.7.5. On circuit #1 I get an "error 1" (I also tried circuit #2 and #3) "Error compiling for board Arduino/Genuino Uno", "collectZ: error: ld returned1 error status", "exit status 1", "error compiling for board Arduino/Genuino Uno"

Only Bluetooth ports were shown in the "tools" so I downloaded a driver for serial port- "/dev/cu.Usbmodem431" This did not solve my problem.

I changed the USB cords with no results.

I have Googled the problem and found no solutions.

Does anyone have any suggestions?

Post the complete error message. You gave us the part that doesn't mean anything, but you need to give us the part before that where it actually tells you what it is mad about.