Formatting an SD card on a Mac can be quite straightforward! You can use the built-in Disk Utility app. First, insert your SD card, open Disk Utility from Applications > Utilities, and select the SD card in the sidebar. Then, click 'Erase' at the top and choose your desired format, such as 'ExFAT' for compatibility with most devices. What are you planning to use the formatted SD card for? It's always interesting to hear about different projects or uses!