I have a neigbour’s iMac that does not boot up, because the hard drive is 100% full. It’s a Fusion drive. It boots up fine in recovery mode, the drives seem ok. There in terminal I deleted some large files, but this does not seem to free up space so it can boot again. Any ideas anyone besides re-installing? Is there a way to „vacuum“ a Fusion Drive so it exposes the free space?