I recently started mining bitcoin through Slush's pool and am just wondering what MH/s rate I should be expecting and if there was anything I could do to speed it up. I'm not a tech guru and have it set up on my Imac that has a 3.06 GHz Intel Core 2 Duo processor and a ATI Raedon HD 4850 512mb Graphics card. The maximum rate I've been getting is about 40-41 MH/s. Is this par for the course for the limited hardware I have and is there anything I can do to speed it up? Thanks.
Most people will tell you that you're wasting your time.
HOWEVER...
It's very important that you are interested in actually mining Bitcoin. It's great to be enthused. I'm glad you were able to get things going. Your hashrate is extremely low for Bitcoin; Mining with a GPU or CPU is now just unfeasible, and so ASICs (Application Specific Integrated Circuits) are the most common solution for this. You buy an ASIC, plug it in, and presto! Many hashes (Exceedingly more than what you're getting).
My suggestion to you is that you should look around here for a while; Check out the Hardware section of the forum, and just plain ask around before deciding that you want to mine for BTC. If you have any questions, feel free to PM me!
Good luck, and welcome!