Currently Being ModeratedNov 7, 2012 5:58 AM (in response to 999Dave999)
Short answer: remove some files from your computer. How you are going to accomplish this will depend on a number of things.
First, select your hard drive icon and use Get Info from the File menu to see how much space you are using and and how much is free. Make a note of how much is free.
Second: restart your computer. Sometimes when you've used your computer with shutting down for a long period of time temporary files don't get trashed or resized when they should. After restarting see of the amount of free space has changed appreciably. If so this is all you might have to do.
If you still lack free space you'll need to look over your drive and decide what can be deleted or moved to an external drive. There are a number of utilities such as OmniSweep and DaisyDisk that can help.
Currently Being ModeratedNov 7, 2012 10:11 AM (in response to dwb)
I've come home to a MacBook Air that won't startup because the start up disc is too full. I get the warning when I restart then a grey blank screen. I can't get on to anything to delete to make space. Help there are no genius appointments until Tuesday :(
Currently Being ModeratedNov 7, 2012 11:46 AM (in response to spacecadet1978)
I know this is closing the door after the horse has bolted, but this is one of the many reasons why I have a bootable external drive. With that drive I can boot up and take a look at the internal drive.
Currently Being ModeratedNov 7, 2012 12:10 PM (in response to spacecadet1978)
One thing that you could do (if you have another computer at hand) is make a bootable USB-drive with a Linux distribution on it (e.g. Ubuntu, Debian). Boot the distro and delete the video-file that you've been converting, then reboot into Mac OS X. Hence; Better only done if you know how Linux works.
Currently Being ModeratedNov 7, 2012 12:11 PM (in response to spacecadet1978)
Your options are limited. You can restart your computer holding command R, that will put you into Restore. From there if you're willing to format your hard drive you can erase the whole thing and restore from backup - that assumes you have one. Or if you have an external hard drive you could erase or partition it and install the operating system on it. That would give you a drive to boot from. Then you could delete the files that are clogging the hard drive. Or you can wait for the genius appointment.