Yosemite installation failure Macbook Pro

[blade897]

Hi all,

I upgraded my 2010 macbook pro from Lion to Yosemite and it appears to have failed as I continually get the message attached. I have done this multiple times. Any way to revert me back to my old operating system or am I going to have to start from scratch?

Thanks

 

[Weaselboy]

How did you download/run the Yosemite installer? It appears the installer image is corrupted.

 

[blade897]

That doesn't sound good.

It was installed from the Apple iOS store. Is anything recoverable?

 

[asriznet]

Hi all,

I upgraded my 2010 macbook pro from Lion to Yosemite and it appears to have failed as I continually get the message attached. I have done this multiple times. Any way to revert me back to my old operating system or am I going to have to start from scratch?

Thanks

This is the kind of situation I will ask, did you do a backup before the upgrade? A lot of users are complacent that such issue will not happen but it does - i've seen a lot of such sad stories.

I assume your Macbook Pro will not load to system and it will keep booting to the installer?

What do you see when you start up the computer while holding down Option/Alt key on the keyboard?

At this point, if you do not have a backup of your data, I would want to secure a backup first - you'll need a spare portable HDD, large enough to store your data from the internal HDD.

 

[Weaselboy]

That doesn't sound good.

It was installed from the Apple iOS store. Is anything recoverable?

What do you get if you reboot?

If it died part way through and won't boot to the old OS, you will need some sort of backup to restore from.

 

[Bucket2233]

I am having a similar problem after downloading from the App Store on my MacBook and I don't know what to do about it. The only difference is that mine doesn't have that error message. Instead it shows as installing the OS, but the install is not progressing. How would I be able to transfer data from my hard drive to an external drive at this point and how would I go about rebooting with the old OS? Thank you so much for any input.

 

[blade897]

After some advice from a friend I was able to get it working.

I turned off the power of the computer and held Cmd+Option+R which got me to Internet Recovery. After ensuring the hard drive was okay through disk utility, I hit the Install OSX button. It downloaded a whole new copy of Yosemite and reinstalled it. All my files were still there. Thanks for the input guys, glad it worked out, and hopefully it can help someone else.