Download Android SDK (original article @ http://androidtricks.net/setup-adb-and-fastboot-android-sdk-mac-osx-18)
Download and extract Android SDK from http://developer.android.com/sdk/index.html to your desktop
Browse to Tools and double click “android”. It will open up a terminal window and load the SDK.
Here go to “Available Packages” and select what you want to download. I selected everything. Wait for the packages to download and install.
Set the Path
Next you need to update the PATH for tools/ and platform-tools/ folder. To do this you need to edit your ~/.bash_profile (create it if you don’t already have one). Add the following two lines
Now go to http://developer.htc.com/adp.html scroll to the middle of the page and download Fastboot binary for OSX. Because HTC host no longer the fastboot binary you can download the version on my blog. Unzip it and place it in /tools/
Now your all set for ADB and Fastboot
Tnx http://androidtricks.net/ for the article!
To check if your fastboot works you can start your terminal and cd /Users/(username)/Desktop/android-sdk/tools
then run ./fastboot-mac devices
When you some output you are connected. Happy modding!! 🙂
Note: please check the comments for more feedback