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Helpful answers
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Sep 20, 2016 4:49 AM in response to utabtechby Carolyn Samit,★HelpfulHi,
- Apps such as Little Snitch, Growl, and MacKeeper, can prevent access apps from downloading
- Disable anti virus software if installed
- Check the firewall in System Preferences > Security & Privacy > Firewall > Firewall Options
- Make sure Gatekeeper is enabled
Open System Preferences > Security & Privacy then select the General tab.
Make sure either Mac App Store or Mac App Store and identified developers is selected.
If that area is grayed out, click the padlock icon to proceed.
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Sep 20, 2016 4:52 AM in response to Carolyn Samitby utabtech,Just my firewall was enabled and I disabled it but this not solved the problem! Now , I have "Request time out " error!