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MAC Sierra booting into system installation .

jdff
jdff asked
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Last Modified: 2017-03-15
I was running Lion and wanted to free upgrade to Sierra, after the first boot now it keeps going to the system installation, it won't boot into Lion or Sierra now, what should I do?
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Commented:
Reboot, then Press command r to reinstall the OS once again.  If Sierra won't install, try command option r and reinstall your original OS.  You may have to erase the disk.  If you have data you need, you can boot into Target mode by pressing t and attach it to another Mac as an external disk and transfer the data.
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needed to connect to the internet.
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