Mac uses all CPU with single program

[damedogdig]

I bought an older gen Macbook air off of Amazon and I seem to be having issues with it maxing out its CPU or using almost all of it using just a single program, whether it Safari or Visual Studios. I wonder if a part of it is going faulty or if there is some way to fix it. If you have any idea please let me know.

 

[capathy21]

Which MacBook Air model is it?

 

[damedogdig]

Which MacBook Air model is it?

Apple MacBook Air MC505LL/A 11.6-Inch Laptop

 

[barbu]

if you go into Activity Monitor, then choose "All Processes" from the View menu, then sort by % CPU (descending), what is the first item in the list?