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I created a bootable macOS Sierra to USB drive 16GB with Terminal method : " sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia –volume /Volumes/sierra –applicationpath /Applications/Install\ macOS\ Sierra.app –nointeraction " This method not detected as a startup disk if I try to chose it. I know I can booted it from ALT (Option) at startup but I have problem on my MacBook I can’t do it… The only method I can be reset my OS is from Startup Disk. Disk Maker work great it Detected on Startup Disk but is to slow for copy if have a another solution from Terminal or another apps to do bootable please
I think you forgot to reformat the thumb drive. Unless you reformat its set for FAT32 or exFAT which won’t work for MacOS (OS-X). From a working Mac open Disk Utility and reformat the thumb drive to GUID partition map and create a Mac OS Extended (Journaled) partition, that should fix the thumb drive. Now either launch the OS installer or use the command line arguments to create a bootable drive and setup the OS installer. Here’s a good writeup on how: How to create a bootable macOS Sierra installer drive When you startup your Mac with the thumb drive you may need to boot up under ask manager (Option key) so you can select the thumb drive as your boot drive.
Hi It tried the methods. but won’t work. The bootable disk is visible, selected it and after sometime, white screen appears. not booting at all.
For me, the bootable disk is not visible, and the option key takes me right into my usual login. Command-R also takes me to usual login.
I reformatted as detailed (extended- journaled) and then I got a notice the the usb was ejected or turned off improperly (it was still in the same usbport). I tried re-inserting it and now my computer won’t detect it at all. has anyone else had this issue? I’m afraid to reformat a different drive and lose it too
I created the os install on usb (sierra) the usb is formatted extended journaled. My old mac is formatted extended journaled. On start-up with option key pressed it shows the usb. On selecting that the mac goes on start up mode with just the apple logo for a long time and re-starts and then does not boot from the usb. What am I doing wrong please? The mac had high sierra before i wanted to go back to sierra as some of the applications I use do not work on high sierra.
