Question about Apple Mac Pro Desktop Computer Workstation (Early 2009) (Z0G100026) Mac Desktop
The spinning wheel and crunching will last for long periods of time which is annoying. This only happens while on the internet. When it does stop crunching it will start again shortly after it stops. What is going on?
Spining colored wheel is an indication of either damaged OSX or bad hard drive. Save your data and reinstall the OSX to check if it is just the Mac OSX problem.
Tech from http://www.computerstar.ca/Macbook_repair_toronto.html
Posted on Apr 16, 2013
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Posted on Jan 02, 2017
This behavior is usually symptomatic of an internal drive that is failing or has failed. The pinwheel appears when the drive is unable to deliver a certain block that the CPU needs to proceed. In our shop, we would boot from a Drive Genius CD and run the Scan test on every block on the internal drive. If blocks show up as bad, the best course is to replace the drive. If no blocks show up as bad, we would run DiskWarrior on the file system to clear up any volume inconsistencies, which can also give rise to this symptom. If neither of these solves the problem, we could back up the user files to an external drive, reformat the internal drive using "erase writing zeroes," reinstall the system from scratch, then replace the user files.
Posted on Nov 28, 2009
This seems to happening a lot at the moment!
From experience it can be a number of things, the worst being a failing hard-drive These imacs are now at least 6 years old and unfortunately HDs don't last forever anymore.
Try starting up from your install Cd and run the disk first-aid found in the utilities menu. Does it fix anything? does the Mac now start up properly. Also while you are in the utility, look to see how much free space is left on the HD. You should have at least 10% of the HD's total capacity free. if not then the system has to work overtime and that invariably invokes the beach-ball.
If the utilities found nothing wrong and you do have plenty of free space then the next thing is to do an "Archive & Install"
This will reinstall the system software which may have become corrupted. The down side is that you will have to run all the updates that you already had done all over again.
You have got everything backed up haven't you?
Posted on May 04, 2010
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