У вашего броузера проблема в совместимости с HTML5
In this video, we are going to look at how to install macOS Sierra. We will make a bootable USB drive that you can use to install macOS Sierra on different Macs.
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First Code:
defaults write com.apple.finder AppleShowAllFiles 1 && killall Finder
Final Code:
defaults write com.apple.finder AppleShowAllFiles 0 && killall Finder
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● Download macOS Sierra (10.12)
https://goo.gl/GN26mS
OR
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