Can I run Adobe CC In my Mac with 8GB of memory ?

What Test Screen Name said. Your system is unfortunately underpowered for Photoshop. As you've discovered, it is slooow.

I never use Photoshop with less than an i7 processor and at least 16GB RAM.

You could try some of the tips in this Adobe article to try and squeeze a little more performance out of your setup but don't expect huge gains since your fundamental issue is underpowered hardware.

https://helpx.adobe.com/photoshop/kb/optimize-photoshop-cc-performance.html

An i3 probably won't cut it. That is an entry level processor, and this is high end software. 8GB may be just enough for one app (at a time) to work, but not fly.