You should not ignore this message, as to do so may lead to unpleasant ramifications which impact your ability to use the Mac. The message is telling you that you are running out of storage space on your startup disk. Sometimes warning and error messages that you receive are somewhat cryptic and require some additional explanation in order for you to understand what they mean. But what does it mean, and is it a problem that needs to be addressed? What Does the ‘Startup Disk Full’ Error Mean? You are not sure what to do about this and you definitely get the feeling that this is not cool. As your computer starts, an extra popup alerts you to the fact that ‘Your startup disk is almost full’. Then one day you are literally assaulted with an extremely disturbing message when you are starting up your machine. You never even consider that this relationship with your computer could ever change. You think to yourself that this is how computing should be for everyone.

Within a few seconds you see your personalized background and shortly thereafter you are opening apps, reading your email or connecting to your favorite website. Most days, you start up your Mac or MacBook and everything works fine.

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