MacBook Air won't start up, won't enter secure mode and repair in Disk Utility Unfortunately some data was downloading and my Mac got stuck, so I forcefully power it off. After that, I couldn't enter the login screen, because the loading bar was stuck.

I tried to enter safe mode, but with no success. After that, I entered single user mode and entered some command to repair disk, but it scanned for 10 minutes and failed.

I finally managed to enter recovery/repair mode with Disk Utility (previously no disk was listed in menu), and clicked 'First Aid'. This failed after one second with something like 'invalid node'. I Googled some time and entered Terminal in recovery mode and entered this command that many people praised, but I got this:

-bash-3.2# /sbin/fsck_hfs -yprd /dev/disk0s2
/dev/rdisk0s2: starting
Unable to open block device /dev/disk0s2: Resource busyjournal_replay(/dev/disk0s2) returned 16
/dev/rdisk0s2: ** /dev/rdisk0s2 (NO WRITE ACCESS)

/dev/rdisk0s2: UNEXPECTED INCONSISTENCY; RUN fsck_hfs MANUALLY.
-bash-3.2#
It seems that you may be trying to fsck the wrong partition. You can use duskutil to find which disk is your boot disk

diskutil list


You're looking for something named usually "Macintosh HD" or "Yosemite". Try the fsck on that, and if you're still getting the "Resource busy" error, try to unmount it, either in the Disk Utility in recovery, or by using diskutil unmountDisk /dev/disk# and trying again.

Hope this helps!