incomplete boot to white screen

Question

Level 1

9 points

incomplete boot to white screen

Incomplete boot to white screen

Can't get disk utilities to come up in Yosemite using apple R...

Have tried soft start, option for disk selection works (external drives) and tried command line single user, ... but, no go

Progress bar gets about 1/3 through then screen goes to white

Ran disk utilities via thunderbolt from a mac mini ... said all is ok

MacBook Pro .. 2.4 duo with 8 Gig ram 250 SSD with 500 GB back up ... removed optical and used the space for the SSD

Never had this happen before

Mac mini, OS X Yosemite (10.10)

Posted on Nov 14, 2015 8:16 PM

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Answer 1

lllaass

Level 10

210,411 points

Nov 15, 2015 1:22 AM in response to wessongroup

Download the Yosemite (or other) installer from the purchases section of the Mac Apps . It should be listed in the Purchases section of the Mac App Store.

- Make a bootable USB media using the following:

DiskMaker X

- Boot from that media

- Format the Yosemite startup disk and install Yosemite

Run Apple Hardware test.

Using Apple Hardware Test

You need one of your original install disks

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Answer 2

wessongroup Author

Level 1

9 points

Nov 15, 2015 5:40 PM in response to lllaass

This is on a Macbook Pro ... not a mac mini

And I can't access login nor disk utility to correct nor check anything nor get to Apple Story using this unit

I as able to access both the SSD and the Backup using a firewire connection/thunderbolt using the MacBook Pro as the target hd

I am able to see both the SSD drive and the back HD, an external 500 GB USB external with a fully operational version of Yosemite and can see the "install" disk which is Snow Leopard" on the laptop when holding down the option key on start up

However ... I can not boot from any of these available disks

I can start my mac mini and another Macbook Pro (2007), but, can't not get this Macbook to start from any of these disks which I've started up other devices on

Thanks for the suggestion ... but, this approach would not solve the problem as I can't get to anything using this Macbook Pro

Hope some else has some thoughts on another way ...

My next step will be to remove both HDD from the unit and start from scratch with a newly formatted drive and see it that will work

I've down all the other stuff, pram .. et al with no "joy"

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