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This video will show you how to easily mine bitcoins using the GPU on your Apple laptop or desktop using guiminer.
Guiminer for Mac can be downloaded here: https://github.com/downloads/pletoss/poclbm/guiminer-poclbm-macosx.dmg
The website for the mining pool is mining.bitcoin.cz. They are really good, and I have received payments from them, so they are 100% trustworthy.
First, setup an account on a mining website (such as slush, but any can be used). Then, download guiminer for Mac from the link above.
Once Guiminer is downloaded, just double click on the .dmg. This will mount the dmg on your desktop, which will basically look like a pen drive. If you open up the mounted folder, then you will see the guiminer application inside. You CANNOT run it from here. Drag it to your desktop or to your applications folder.
Double click on the guiminer app after you have moved it, and wait a minute while it starts up.
When guiminer is started up, go to file, new miner, and select opencl. Then name it anything and hit ok.
Click on the tab at the top of guiminer for the miner you just created. Then click on the dropdown box and find the mining pool that you signed up for (slush is shown in the video).
Then, input your username and password for the miner.
Then select the hardware that you want to mine with. In the dropdown list at the bottom you will probably see your video card and processor. Your video card is usually going to be a lot faster than your processor, so I would recommend using that.
After that, just hit start mining and you’re all finished.