Is it safe to reapply thermal paste on 2012 mac?

Hi @tkrzkr,

Thermal paste is basically infinitely replaceable :). This means you can remove it from your CPU and/or GPU and re-apply. Because this is a 2012 retina, i really hope your Dedicated GPU hasn't failed because it means your too late to applying thermal paste.

In order to apply it, just remove the remaining chunks on your processing unit using some alcohol or some other recommended method, and then purchase a tube of it (Noctua NT-H1 or Arctic MX-5 are some of the best ones) on somewhere like Amazon. After you've got your materials, apply a small amount of thermal paste on each processor. You can't apply too much, so make an educated guess for how much because you'll never have too much. If your not confident in yourself guessing, look up a guide online as Macbook pro re-paste guides aren't few and far between (AKA they are everywhere).

Hope this helps and let me know how it goes.