I didn't know where to post this so I thought I'd put it here, please move it if it's in the wrong place! I'm trying to install a raspbmc image on an 8GB sd card for my raspberry pi. I put it in my MBP sd card slot and do the following: Code: diskutil unmount /dev/disk4s1 dd bs=1m if=~/Downloads/installer.img of=/dev/rdisk4 and every single time I get this error: Code: dd: /dev/rdisk4: Permission denied I tried this with a USB drive and it worked just fine. I have tried it with the sd switch in both locked and unlocked positions and have even tried blowing in the sd slot as per this page. Is my sd card slot well and truly screwed or is this another problem? Do I just need to blow harder?!