i recently upgrade my macbook pro (mid 2010) ram to 8gb and i was wondering if i can use my macbook pro 4gb ram (came with it) to a mac mini (mid 2010)? thanks advance
Yes; the 2010 Mini and the 2010 Macbook Pros both use the same 1066 MHz DDR3 SDRAM, so there's no problem taking RAM from one machine and putting it into the other.