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Memory Upgrades for 2019 Mac Pro - Save Up to 65% vs Factory Costs
Upgrade the memory of your 2020 iMac up to 128GB
Disable Incoming Internet Connections
Enabling the Mac OS X Firewall.
Enable the Mac OS X Firewall
If you are not using File Sharing, click the all incoming connections.
button and disable
Advanced options for the Mac OS X Firewall