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Question: installing 10.13 on external HDs

i have 3 external mechanical HDs [clones of my 'boot' 10.12.6 HD] attached via FW800 and all 3 FAILED to upgrade to 10.13

I even ERASED 1 drive to see if that helped - didn't

my mac laptop is listed as being OK to upgrade to 10.13

this is the way i 'test' new macOS before i commit to the new OS

MacBook Pro, macOS Sierra (10.12.6), MBP 17 2.53 i5 8, GB RAM 480 GB SSD

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You asked the question: "How is your external drive connected?" I answered "USB3"

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Nov 18, 2017 9:52 AM in response to Eau Rouge In response to Eau Rouge

truied to upgrade again a few minutes ago and got the same error message that the OS cannot be installed

i think it may have to do with the HD 'toaster' connected via FW800 to my macbook pro

my toaster's connections [except mine is older and i have usb2]

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Nov 18, 2017 9:52 AM

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Nov 19, 2017 6:50 PM in response to kulyk In response to kulyk

i downloaded the installer for 10.13.1 last nite and ran the installer and wen to to bed

i woke up to my screen 'blank' - literally blank

tried keypad strokes and could not get it to show anything

as a last resort i powered down

i booted up and held down 'option' button

i saw my internal boot SSD drive my external clone volume AND a recovery external 10.13.1 volume

LOOKS LIKE 10.13 was applied

i tried to startup from my external clone volume but it took over 20 min to boot up so i pressed the power button again and restarted from internal SSD

any ideas of why external boot volume is taking so long to startup ?

Nov 19, 2017 6:50 PM

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Question: installing 10.13 on external HDs