It's a certificate issue created by apple being carefull with their installation media.
It is a probem I know they did this back in Febuary and then again in early may. Set your time and date back and then try in stalling. Then or otherwise download a new installer from apple and then setup a new installation USB media device. Which reminds me I have to setup a new one myself. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Anne Robertson Sent: Friday, 17 June 2016 9:10 PM To: [email protected] Subject: Re: A Question About Installing El Capitan from a USB Key, I tried and Failed Mark, Have you already used that particular installer or was this the first time? I can’t think why it would not work a second time. Cheers, Anne > On 17 Jun 2016, at 10:20, M. Taylor <[email protected]> wrote: > > Hello Everyone, > > The long and short of it is that for the past 3 releases of OS X, I > have made USB key installs so, in case of a catastrophe, I could > simply insert the USB key, launch the install and get back up and > running without having to be connected to the internet. > > Tonight, I decided to perform a fresh install of El Capitan on my 2009 > MacBook Pro. > > Before I began, I completely wiped the internal drive of all its > partitions but, when I tried to install from the USB key, I kept > getting an alert that the copy of El Capitan could not be verified and > the only option I was given was to click the OK button, upon so doing, > simply took me back to the beginning/start screen. > > After going through this several times, I attached an Ethernet cable, > thinking that this would allow the copy to be verified but, no, I kept > receiving the same alert. > > Finally, I gave up and used the Yosemite USB key which did not give me > any trouble, whatsoever. > > Any thoughts on this? > > By the way, before I began, I tested El Capitan on this particular > computer by running a cloned copy of it from one of my USB Thunderbolt drives. > > I would hate to think that my El Capitan USB key is useless. > > All comments, greatly appreciated. > > Thank you, > > Mark > > -- > The following information is important for all members of the Mac Visionaries > list. > > If you have any questions or concerns about the running of this list, or if > you feel that a member's post is inappropriate, please contact the owners or > moderators directly rather than posting on the list itself. > > Your Mac Visionaries list moderator is Mark Taylor and your owner is > Cara Quinn - you can reach Cara at [email protected] > > The archives for this list can be searched at: > http://www.mail-archive.com/[email protected]/ > --- > You received this message because you are subscribed to the Google Groups > "MacVisionaries" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/macvisionaries. > For more options, visit https://groups.google.com/d/optout. -- The following information is important for all members of the Mac Visionaries list. If you have any questions or concerns about the running of this list, or if you feel that a member's post is inappropriate, please contact the owners or moderators directly rather than posting on the list itself. Your Mac Visionaries list moderator is Mark Taylor and your owner is Cara Quinn - you can reach Cara at [email protected] The archives for this list can be searched at: http://www.mail-archive.com/[email protected]/ --- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/macvisionaries. For more options, visit https://groups.google.com/d/optout. -- The following information is important for all members of the Mac Visionaries list. If you have any questions or concerns about the running of this list, or if you feel that a member's post is inappropriate, please contact the owners or moderators directly rather than posting on the list itself. Your Mac Visionaries list moderator is Mark Taylor and your owner is Cara Quinn - you can reach Cara at [email protected] The archives for this list can be searched at: http://www.mail-archive.com/[email protected]/ --- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/macvisionaries. For more options, visit https://groups.google.com/d/optout.
