My macbook reaches 50% at the progress bar I start up and just sticks. I tried safe mode. It still sticks and I can't reach safe mode when holding shift. I tried command, alt, p and r. Nothing. I tried repairing with disk utility. No errors. It still sticks. I tried reinstalling. It still sticks. I tried a clean reinstall but can't back up data because I get an error -61 when trying to save to external hard drive (I think it's a permissions error.) The only thing that works is holding command and r to disk utility/online help. I ran it in verbose mode and I get this hfs : Removed 1 orphaned/unlinked files and 0 directories. Warning : couldn't block sleep during cache update. Warning : proceeding w/o DiskArb dev/disk1 on / (hfs, local, journaled) BootCacheControl : Unable to open var/db/BootCache.playlist : 2 No such file or directory bash : etc/rc.server : No such file or directory bash : etc/rc.installer_cleanup : No such file or directory USBMSC Identified non unique 000000000820 0*5ac 0*8406 0*820, 3 Waiting for DSMOS... and some more lines under it but those messages contained the only errors.