Some easy steps to avoid tech support scams...

1- Don't Trust any random Call, it could be fake. 

2- Use Caution When Granting Remote Access. 

3- Always do a little back ground search 

4- Never share password detail to any one 

5- Know what software your computer uses and keep it updated 

For further detail: http://www.appletechnicalsupportnumbers.com
Apple Mac Support Toll Free Number- 1-800-281-3707.