My iMac won't update to the new OS. It keeps telling me to quit & re-start. I cannot log in. I'm stuck in this loop.
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I bought my iMac in 2010 so I'm not sure what model it is & I cannot get into my mac to find out. I clicked on the update OS link provided by apple & my iMac won't update to the new OS. It keeps telling me to quit & re-start. I cannot log in. I'm stuck in this loop.