How to speed up you mac ?

Hi Guys

My Friends recommend me this program .. they told me that he fix with it all bugs and clean and speed his iMac "(Like Magic) One of them said " .. In fact I don't have any idea about it and I don't have knowledge about this kind of softwares ..

Please Give Me Your Ideas Guys

NO NO NO!!!

The only programs which you should use are (both free) ONYX and Malwarebytes, once a month or so.

https://www.titanium-software.fr/en/onyx.html
https://www.malwarebytes.com/mac/

After a month or so you will, get a prompt to upgrade to the paid for version on Malwarebytes. Ignore and continue using free.