System Data on a Mac can take up significant space, containing essential and miscellaneous files like cache, logs, and system files.To view System Data storage, go to Apple Menu > About This Mac > Storage, which typically appears in gray on the storage bar.Managing System Data involves clearing cache files, emptying the Trash, and using tools like BuhoCleaner to locate hidden system files.BuhoCleaner offers a quick and easy way to clean up System Data, freeing up space on your Mac and improving its performance.