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LittlePaul

macrumors member
Original poster
Mar 15, 2014
52
1
hi,
today I came back from holidays and I turned my mac pro ...
the system was looking after me an update after which the mac is following but stops at a black screen with the cursor ...
I tried several options but none worked ...
can you help me?

I have a Mac 2009 4.1->5.1 with a GTX770...

thank's
 
It sounds like you are using Nvidia's drivers. Switch back to Apple drivers. IIRC, 770 is Kepler (basically a 680) and so it should work with Apple drivers.

If you don't switch, this is going to happen every single time there is an OS update.
 
i cannot do it... i have only a black screen with mouse....
and if i try to start with USB pen with ALT key it not start...
It not star if i press any key....
 
Maybe you can do an NVRAM reset, that should switch back to the default drivers. If not, put your old card back in temporarily to switch the drivers back.
 
whit the original Ati5770 it's stop at this screen...
and now? What i do?
 

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do a verbose boot. restart holding Command-V. There will be text. reading that text may give more information about what task is causing the delay. Without more information, everyone is just guessing. In verbose boot , Disk I/O errors would indicate failing storage device.

After an improper shut down , the next boot will always take longer. I'd wait at least 5 minutes before declaring a stuck boot up. Sometimes the boot will hang due to failing FSCK too, it will attempt 3 times to repair and then shut down. In a verbose start up , you can read the progress.

note: after a verbose start up , the next shut down will also be verbose. This isn't a problem and is expected.
 
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You may try holding Command + R to boot into recovery partition.

If success, then use disk utility. Try to "first aid" the drive AND partition.

If there is any error, you better don't touch the drive now (if important data still inside).
 
i just use this solution and in the disk no hay errors...
at this time... i can install Sierra on my Mac?
 
i just use this solution and in the disk no hay errors...
at this time... i can install Sierra on my Mac?

My understanding, yes, you can. And may be this is the easiest fit.

Disk warrior usually can fix this kind of fault. But you need another boot partition (or another Mac) to use that, also, it's not a fee solution.

If no hint. Then boot into recovery, re-install Sierra on top of the current OS, may able to fix the issue. And it should not hurt anything anyway (base on the drive is healthy).
 
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