Graphics glitch/corrupt login screen images

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so updated yosemite couple of days ago on 2011 macbook pro , have shut macbook's lid putting sleep/logging out several times do...

can't recall how many times, 1/4 1/3 of time, when open macbook , wake login, wakes corrupt or glitched images around login screen...

can still type password (even though can't aways see it) , login.
displays account image correctly text in top right corner...

appears issue transparency or reference background image displayed...

here 2 photos:

[​img]
[​img]​

ideas? or shouldn't have upgraded os?

has else seen this?

can do?
 

ah!

i'm getting similar issues in iphoto when using nikon .nef (raw) files. causes iphoto similar second screen.

suspect might seeing os update soon.
 


Forums Macs macOS OS X Yosemite (10.10)


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