Early 2009 iMac
The App store is countinuasly showing Software update 1.8.3, even after restarting as requested
Not sure If qlitch or it is just not updating, wich for Macs can be a concern
Explain what you mean that it is showing the update. Is there a flag on the app icon or is it in the Purchases list for download?
Its always in the "Updates avalible" window of the Mac App store, Click update, begins the procces, askes to restart like most updates for the OS, then it is still in the Updates window, done this several times same story
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