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macOS Sierra install arrow option greyed out, help!

I tried following this guide. I am stuck here plz see the . Disk I can see but the install arrow option is not active. Not able to select . Already format extended journal, GUID. Help plz

Urgent

Macbook early 2011 13 inch with dvd

500 gb hdd

16 gb ram

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Can you take a picture of the screen you're seeing? Adding images to an existing question

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