How to free up space on Mac startup disk error on the MacBook Air is something that you will most likely encounter at some point as someone that owns or works with this laptop. The 128 and 256 GB versions of the Air are really easy to max out, and a full hard drive on my MacBook Air is something that I have been living with since only a short while after I started using one.
How to free up space on Mac startup disk
Remove Old iPhone/iPad Backups
If you open iTunes and choose iTunes> Preferences from the menu bar at the top of the screen, you can then click on the “Devices” tab to see a list of iOS backups you’ve saved on your Mac.
These backups are important but can take up a lot of space depending on the capacity of your iDevice and the amount of data stored on it at the time the backup was made.
While I don’t basically recommend deleting your current iPhone or iPad backup, check this list to see if you have any old or unnecessary backups, for example, those from old iPhones you traded in or those made before an iOS upgrade.
If any of the upgrades in this list are no longer needed, just click to select one of them and press the Delete Backup button.
You may be astounded at just how much free space these iDevice backups can consume! If you’re really painful to free up some space, also consider deleting all of your local iDevice backups and backing up to iCloud in its place.
You’ll probably need a paid storage tier for your iCloud account, but if you have free space in iCloud, you can completely back up your device without needing a byte of space on your Mac.
Clean Out Your Downloads
The Downloads folder is the default location for all of the files you download in Safari, Chrome, or Firefox, but thanks to the way that these browsers can automatically open or launch files once they’re downloaded, many users build up a huge quantity of old and unnecessary refuse in this folder. To check out your own Downloads folder, launch Finder and find Downloads scheduled in the sidebar.
Once that folder opens, spend a bit of time looking through it and trashing what you don’t want. Almost all disk images, for example, can be deleted.
Another helpful tip is to change to List View and sort your files by date, or size. This can help you identify which files are the oldest or largest, helpings you quickly find good candidates for deletion.
Empty Your Trash
This one seems kind of obvious, but you’d be amazed at the number of Macs I see that’ve had files sitting in the trash for years. To do this, just open Finder, select Finder in the menu bar at the top of the screen, and click Empty Trash.
You can also empty the trash on your Mac by right-clicking on the Trash icon in your Dock and choosing Empty Trash, or by launching Finder and using the keyboard shortcut Shift-Command-Delete.
Delete Unnecessary Media From iTunes
Since its first appearance in 2001, iTunes has grown from a humble MP3 manager to massive application which handles music, movies, TV shows, podcasts, audiobooks, and iOS apps. As a result, the media stored in iTunes is often the single largest consumer of your Mac’s precious storage space.
How to free up space on Mac startup disk, you don’t necessarily need to choose between free space and your media, as you can delete certain iTunes files locally while still retaining on-demand access to them via the cloud.
First, check out your current storage situation by launching iTunes and selecting a media type movies, TV shows, music, etc. — from the drop-down menu near the top-left of the window.
How to free up space on Mac startup disk, If it’s been a while since you restarted your Mac, sometimes doing so will reclaim a bit of space, as the macOS reboot process involves clearing certain reserve and temporary files which may have accumulated in the days and weeks since your last reboot. Of course, you’ll do that under the Apple Menu at the top-left of your screen.
If none of the above suggestions gives you enough free space to get by on, then it might be time to consider some more serious options.
One option is to consider improvement your Mac’s drive to a larger one, although this is a regularly more difficult, if not impossible, solution for many users as Apple continues to release closed and non-upgradeable systems.
In the absence of an internal storage upgrade, however, external options are always available, and you could think about moving your entire iTunes or Photos Library off onto an external drive.
I don’t usually recommend doing so, however, since this approach will make backups and management more cumbersome. If you absolutely have no other choice, though, you’ve gotta make room somehow.
And finally, if the “About This Mac” window doesn’t give you enough information, you can always consider using a third-party utility to see where all of your space is being taken up.
There are tons to choose from, but my favorite is OmniDiskSweeper from The Omni Group. If a first pass with OmniDiskSweeper doesn’t catch everything, try running it with superuser privileges.
No matter which approach you take to How to free up space on Mac startup disk, keep in mind that you should always make sure that your backups are solid before getting started, and don’t ever delete anything if you don’t know what it is! The solution to “I have to free up space on mac startup disk” is definitely not “let’s go delete stuff in the System folder”.