And unless you set up an external drive, it’s probably also the place where all your other local files are stored.

For most people, this is the built-in drive on their Mac. The startup disk is the hard drive or SSD that holds the operating system for your Mac. If your Mac popped up with a “Your disk is almost full” message, it was almost certainly referring to your Mac’s startup disk. What is a startup disk and how is it full? Just install MacKeeper and enable the Auto-scan feature to let it start freeing up gigabytes of space on your startup disk automatically. You can use MacKeeper for this thanks to its Safe Cleanup, Duplicates Finder, and Smart Uninstaller features. The best way to prevent your startup disk getting full is by keeping your Mac clean on a regular basis. This guide will show you everything how to check if your startup disk is full and how to free up essential space on your Mac. The result? An annoying 'Your disk is almost full' message and possible poor performance.ĭon’t worry, we’ve got you covered. Everyone keeps their house clean, but surprisingly, many Mac users neglect cleaning their Mac startup disks.

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