Hi,
I have a late 2013 27" i7 imac turning on os Maverick and I can't upgrade to High sierra (nor el capitan or sierra).
my imac: https://support.apple.com/kb/SP688?viewlocale=en_EN&locale=en_EN
I have replaced the hard drive ( by a seagate 1To) since my original HD fails.
once made, I turned it on and it launched web recovery and installed os maverick with success.
then I uploaded sierra (it was before high sierra goes out) from app store and launched it.
I installed it on the second partition of my HD (the other is for maverick)
when it restart, the apple logo poped up with the progression bar but it fails and reboot again and again.
I've tried several time without success.
So it've tried the same on an external HD (usb) but same problem !
I've tried with El capitan (from another late 2009imac I have) without success.
so i've tried with the brand new high sierra..... without success.
I've looked at SIP and from the el capitan recovery disk I've launch on Terminal: csrutil disable.
it does not change anything.
it makes 2 months (1 hour a week ;-) ) I try to upgrade it... can't find what's happening.
any advice welcome.
I have a late 2013 27" i7 imac turning on os Maverick and I can't upgrade to High sierra (nor el capitan or sierra).
my imac: https://support.apple.com/kb/SP688?viewlocale=en_EN&locale=en_EN
I have replaced the hard drive ( by a seagate 1To) since my original HD fails.
once made, I turned it on and it launched web recovery and installed os maverick with success.
then I uploaded sierra (it was before high sierra goes out) from app store and launched it.
I installed it on the second partition of my HD (the other is for maverick)
when it restart, the apple logo poped up with the progression bar but it fails and reboot again and again.
I've tried several time without success.
So it've tried the same on an external HD (usb) but same problem !
I've tried with El capitan (from another late 2009imac I have) without success.
so i've tried with the brand new high sierra..... without success.
I've looked at SIP and from the el capitan recovery disk I've launch on Terminal: csrutil disable.
it does not change anything.
it makes 2 months (1 hour a week ;-) ) I try to upgrade it... can't find what's happening.
any advice welcome.