Cloning DVD/CD media to USB is not guaranteed to work.The source may be incorrectly copied to an iso/ disk image.
I don't know what could be wrong with your USB stick but there are many reasons booting can fail when imaging install disks like this… Unetbootin is another option, I think that creates it's own boot environment & chainloads like USB loader. I think I tried this eons ago but it wasn't for me so I stuck with dd & the other commands. Restoring often requires you to 'scan for restore' too, which checksums the content IIRC. The 'convert' option in Disk Utility has some equivalence to the 'hdiutil' command, so if that is the 'convert command' you are are referring to that may also be handled by Disk Utility (I'm not in front of 10.11 at the moment to check in it's DU, it's probably under the Images menu). dmg to make Disk Utility happier sometimes, however that is rarely successful, I can't recall the distro.
I suspect it is to make 10.12 look like an essential upgrade ? No idea, it's madness & downright hostile for anyone with multiple disks or monitors over 640x480. The words you use cause you to look for something that doesn't exist - this is probably why you are getting frustrated, also i f you want to be really pedantic, you are not 'burning' to a USB flash drive, you are 'writing' to it.Īnd as an aside, every time I open Disk Utility it hurts! Why can't I even resize so I can see the names of the volumes!!! You may call it 'burning' if you like, however 'burning' concerns CD's & DVD's (optical media that is written by a light source). If you want to be really technical, when writing to a flash memory, you ARE burning it. I still call it "burning" for a flash drive. It has just been moved to a menu in 10.11. The feature you want is called 'restore' it has always been called restore in Disk Utility on OS X.
iso written by Disk Utility - in fact some won't even write via Disk Utility. iso, however I have not always been able to boot from an. iso files, some really need to be burned to CD/ DVD to boot a computer.ĭid you read all of my post and follow the link?Ī disk image is effectively the same as an. iso, I have had mixed success with certain. The Raspberry Pi foundation has a reasonable explanation on that topic, replace the sdcard with your USB disk.ĭisk Utility can still restore volumes on 10.11…ĭisk Utility (El Capitan): Restore a disk image to a disk You can use 'dd' to write the image in Terminal. You would need to manually create the correct file system for it to work before copying. iso files contain the filesystem structure which is lost if you simply copy via the Finder, it breaks booting & features that require that partition structure. iso is - if it is for making a bootable OS from Linux or similar Barney-15E's suggestion will fail to work. Good point Barney-15E, I read 'USB drive' & assumed Bebias was talking about a USB external optical drive, it probably isn't the case.īebias, please tell us what the purpose of the. Then copy the files from it onto the USB stick. Burning is for optical media.ĭouble-click the.
On newer Macs from 2019(*) with the Apple T2 Security Chip, you may need to change the SecureBoot settings for MemTest86 to boot.You don't "burn" a USB drive, you copy files onto it. When finished, Reboot your On a Mac, you need to hold down the ALT / Option key on the Mac keyboard while powering on the machine to boot from USB.Total and compete data loss from your hard drive, if you overwrite the wrong drive. The consequence of picking the wrong drive are potentially disastrous.
Warning: all data on the USB key will be lost.ģrd warning! Make sure that the device used in the dd command above is correct.
is the file path for the input image file. dev/disk2) not a partition designation (ie. is the device the USB key is assigned to. Note: For Ubuntu, the bs= 4M must be capitalised.
Inside the Zip there is a "disk image" file.
Download the current Memtest86 package as a Zip file from this page.Creating a MemTest86 bootable USB Flash drive in Linux/Mac