Power doesn’t get “pushed”. Power (or current if you prefer) get’s used . Howerver, if your brick reports 60w, your macbook will behave as if you used a genuine 60W adapter. Meaning; a 15” macbook pro with completely drained or absent battery, wil not boot. Depening on what you do, it can be that you loose charge of the battery instead of gaining as well. Because since it reports as 60W, the macbook will lower the charge current. If you are demanding a higher current then the charging current, your battery will drain as well.
anyone know’s a good source for 85W magsafe 1 cables? The ones I got off ali and ebay, all identify as 60W. Since there are knockoff chargers that report as being 85W, I guess that there are cables with the right chip inside the magsafe connector. And the people responding here that the cable has nothing to do with this, you don’t know what you are talking about. The chip where the smc communicates with is located on a small pcb (where the pin’s are on), inside the magsafe connector.