keyApplicationTitle keyWarningOptimalInfo keyOKButton

The next time it happens, press Shift-Command-4, then press the space bar once, and then hover your mouse cursor over the warning window. When the window turns blue, click the window and the system will take a screenshot of the warning message (the screenshot will appear on the desktop). Then post back here and embed the screenshot file in the posting so we can see what it looks like.

Im getting this too but only on my Mac Pro and not my MBP

I am getting thisexact same alert on start-up, after 10.7.4 install, on Mac Pro.

Ditto

Very bizarre. Does it happen if you reboot into Safe mode by holding the Shift key at startup?

In addition to trying Safe Mode, what applications do you have installed on the system, and do you have any hardware add-ons? This may be a warning about an applicaiton/hardware incompatibility of sorts, and since multiple people have this problem it may be a buggy warning regarding something like that. Do you have any special setups such as encrypted drives (FileVault), or have the systems bound to a directory service?

Ditto here, on Mac Pro (and not MacBook Pro) on every boot after installing OS 10.7.4 upgrade. No encrypted drives, not bound to a directory service.

Does the same happen if you boot to Safe Mode by holding the Shift key at startup?

Additionally, what model of Mac Pro are you guys using? You can find this in the "System Information" tool (available in the Apple Menu > About This Mac > More Information > System Report) under the "Hardware" section. The model should be something like MacPro1,1 or MacPro4,1.

Thanks for the quick and thoughtful suggestions.

1. "MacPro5,1" (it also says "Mid2010").

2. Booted up in Safe Mode and got the same error message (or whatever that window is).

3. Miscellaneous info

- 6-Core Intel Xeon

- 2.66 GHz

- Diagnostics: "Power On Self-Test" (from last boot): "Passed"

- 2 X 8GB DDR3 ECC 1333 MHz RAM

- Boots up on "APPLE SSD TS512B"

....

Very strange. I was hoping it may have been a precautionary warning about some Mac Pro systems such as the 1,1 model that has 32-bit EFI firmware, which would prevent it from running the upcoming Mountain Lion, or maybe an extensions error for some peripheral component of the systems. I'm kind of at a loss myself, and I figure Apple will have to clarify this situation. Unfortunately I don't have a Mac Pro so I can't replicate this problem to get to the roots of it.

My only suggestion is you might try reinstalling the 10.7.4 Combo updater (available here: http://support.apple.com/kb/DL1524) or at worst try reinstalling OS X from the Recovery HD partition and then updating with the Combo updater. Reinstalling will only rewrite the system files on your computer, and not touch your applications, user data, and settings.

Thanks again. I will try at least the first--the second sounds painful with all my apps, but I may resort to it as well--and report back here the results. You've been super-responsive!

Another thing you can try is to open Activity Monitor when the warning pops up, and then sort the items by PID (process ID). Then watch the Activity Monitor window and click the "OK" button in the window to close it, to see if any process disappears soon after closing the window. This is sometimes not easy to use when figuring out what processes might be involved, but after several tries if the same process quits quite obviously then that might be a clue of sorts.

An additional task you can try is to create a new user account and then log into that account instead of your main one. When doing this either immediately after boot or after logging out of your current account, does the window appear?

In further failing efforts to fix the problem:

1. I deleted 4 login items and rebooted, each time having the warning appear again (so I've added the login items back):

- EyeTVHelper

- SpeechSynthesisServer

- iTunesHelper

- Dropbox

2. Five times I have rebooted, having the warning appear; each time I:

- opened Activity Monitor,

- sorted items by PID,

- and just couldn't identify a particular process as disappearing when I closed the warning window.

3. DTDunn: I too wondered if the problem could in some way relate to the SSD I'm booting my Mac Pro from. Probably, though, this isn't the source of the problem as my MBP (which boots under the 10.7.4 update) also boots from a SSD and boots without showing the warning window.

As additional info, yesterday I received a phone call from an Apple rep regarding the problem we are all experiencing and sent him (via e-mail) 2 files, the 2nd generated by an app he included: (a) Mac Pro.spx, and (b) an ACCD....tgz file. He said the problem appeared common enough among us Mac Pro users that Apple was investigating. Let's hope a fix appears or we are notified of a fix.

Thanks, again.