![How To Make A Boot Disk On Sd Card For Osx How To Make A Boot Disk On Sd Card For Osx](http://img.techiesparks.com/2014/07/format-usb-sd-card-mac.png)
With new OS X coming out, it would be prudent to experiment before upgrading. Some of us do not have enough HD or SSD disk space to spare from our Mac's internal drive.
![How To Make A Boot Disk On Sd Card For Osx How To Make A Boot Disk On Sd Card For Osx](/uploads/1/2/5/4/125407905/958241668.png)
Goal: Boot into Tails from an SD card on a Macbook Air running El Capitan. Specs: Macbook Air, 8Gb RAM, i5, Running OSX 10.11 'El Capitan'. Solutions tried and problems with each:. Follow for Mac OSX. Problem: After everything is done, reboot, only the Mac HD shows up. Use rEFInd (v0.9.2):. Created two partitions on the SD card, with a GUID Partition Table (GTP).
Both Journaled (HFS+). /dev/disk2s2 - Tails (dd'd following the instructions from 1.). /dev/disk2s3 - rEFInd:./install.sh -alldrivers -ownhfs /dev/disk2s3 (Also tried without the -alldrivers flag). Problem: rEFInd option shows up when rebooting.
After selecting it I get three options: Boot Mac OSX, boot Tails (has the Tails logo), or boot legacy BIOS Tails (just shows a windows-like logo in grey). If I select the one with the Tails logo, it goes to a new screen that says: rEFInd - Booting OS Starting bootx64.efi Using load options ' Failed to read blocks: 0x2 I have already tried erasing the Tails partition and redoing it a couple of times, with the same output. If I select the one that says legacy BIOS Tails. I get a black screen that says the usual No bootable devices found. Insert one and press any key to continue. Let me know if there is anything missing that could help debug this problem.