is it possible to reinstall (repair) macOS sierra

[kaijajan]

I applied the latest macOS sierra patch (10.12.5) from 10.12.4 but the upgrade procedure did not complete, because it stuck at somewhere during process.
Now my mac perform really odd~I wouldn't able to shutdown it and took very long time to boot~(installed on ssd and it worked really good before upgrading)
I wonder is it possible to reinstall/repair macOS sierra and keep all the data?

 

[BreBo]

@kaijajan, please update your profile (personal details) with your Motherboard or Make/Model, CPU and Graphics Card.

Profiles need to contain at least your primary system to assist others with helping you.