Click Get or the iCloud download icon to download it. I tried it with the 13' and it does detect them so it definitely looks like somethings screwed up with USB on this thing. Open this Mac App Store link.If your browser asks, select to open it in the Mac App Store. I did try and side step the problem by using Ultimate Boot CD with Grub2 but it wont even detect the disks (only the internal). The mad thing is that this happens even with Mac OS X on an external USB hard disk!Ĭould another kind forum member help me out and try this on a 2011 model? Do you get the same results? Any ideas what's wrong? I think this is because the USB ports haven't 'come up' again. Unfortunately the disk doesn't spin up in time or doesn't spin up at all and then it craps out saying it cant find the selected disk. Warning The creator will prompt to erase the drive to reallocate the space then it can write the bootable files to this drive. Plug in your bootable USB device and boot up your 2018 2019 Macbook Pro from USB, hold the Command () key and youll see the startup disk screen, select the USB and boot it up. Then, choose a USB drive to create the bootable disc. The Mac (or EFI) then decides its ready to boot the selected OS. Install and run EaseUS Data Recovery Wizard for Mac on another Mac computer, and select 'File > Create Bootable USB'. The problem is that as soon as you try and boot from either of them the USB ports seem to shut down causing the external disk to spin down. I have one with Windows 7 and one with Ubuntu. I have installed rEFIt on my new 17' MBP so I can boot of a couple of external USB hard disks.

Boot usb key macbook pro