Boot MacOS on external disk - default


hello!
have qestion.

have imac usb external disk macos high sierra. ( no apfs ).
when power imac, see black screen. after 10 seconds, apple logo appears , booting external usb disk. works fine need boot default external usb ( save 10 seconds ;p )

internal disk clean - no macos on drive.

can change in terminal or other app setting?

in settings> start disk> have external disk. ( macintoshhd macos 10.13.2).
 

try going startup disk preference pane , re-designating external drive "boot drive".

guess "short delay" after press power-on button going "the norm".
imac first has check hardware integrity, , "poll buses" find external boot drive. , then... start booting it.

i've been booting , running 2012 mac mini external drive 5 years now.
works fine...
 


Forums Macs Mac Basics and Help


  • iPhone
  • Mac OS & System Software
  • iPad
  • Apple Watch
  • Notebooks
  • iTunes
  • Apple ID
  • iCloud
  • Desktop Computers
  • Apple Music
  • Professional Applications
  • iPod
  • iWork
  • Apple TV
  • iLife
  • Wireless

Comments

Post a Comment

Popular posts from this blog

Other Unknown error

hello community. have upgraded ios on iphone 7. after upgrading cannot open 1 document file (xlsx format) emailed me. getting message: unknown error have had similar issue?   make sure have correct url , owner of file hasn't deleted it. stuff done google drive apps in google drive make easy create, store , share online documents, spreadsheets, presentations , more. better suggestion on issues related excel files can find here: excel repair on-line   Forums iPhone, iPad, and iPod Touch iPhone iPhone iPhone Mac OS & System Software iPad Apple Watch Notebooks iTunes Apple ID iCloud Desktop Computers Apple Music Professional Applications iPod iWork Apple TV iLife Wireless
Read more

Trump supporter?

if betting man, definitely. http://www.eastbaytimes.com/2017/12/14/video-of-woman-in-walnut-creek-starbucks-gets-attention/   obama supporters? if betting man, definitely. http://www.nydailynews.com/new-york...ing-trump-robbed-bronx-deli-article-1.3696006   Forums Mac Community Politics, Religion, Social Issues iPhone Mac OS & System Software iPad Apple Watch Notebooks iTunes Apple ID iCloud Desktop Computers Apple Music Professional Applications iPod iWork Apple TV iLife Wireless
Read more

com.apple.DiskManagement.disenter error -119930878

here's odd one! 1 of our 2015 macbook air notebooks in office crashed , became unbootable after user clicked high sierra upgrade sierra on it. tried sorts of things working again, including both internet recovery , regular recovery. each time, partially install high sierra , stop error saying, "macos not installed on computer", followed specific error code mentioned in message subject line. have identically configured air (8gb ram, 512gb ssd, core i7) upgraded sierra high sierra without problems @ all, should work! thing able problem machine installing sierra usb thumb drive. did that, of user's data accessible again (nothing lost, thankfully!) , working normally. tried running high sierra upgrade again fresh app store download, hoping original issue stupid user powering computer off in middle of upgrade process. nope! exact same error , resulting unbootable machine. computer passes apple hardware tests flying colors , seems fine
Read more