Upgraded to siera now #$%^&*

[headviking]

I finished upgradeing to Siera and now my safari and app store will not load. Safari just gives me a ball spinning and app store just waits. Fire fox load (slowing) but it still load. How can I reinstall Siera oe fix this problem. I have tried everything I could find on the web. I might even have done some damage (hope not).
Any ideas?

Thanks
macbook 2011
250gb SSD 1st drive
replaced super drive with a 500gb drive.
8mg ram

 

[gwhizkids]

I I think you may need to give us a little more data: did you just install Sierra? Have you attempted to restart the Mac? If so, have you tried to restart it in safe mode?

 

[dianeoforegon]

If you installed 10.12.4, see these options in Recovery Drive.

Command-R
Reinstall the latest macOS that was installed on your Mac, without upgrading to a later version.1

Option-Command-R
Upgrade to the latest macOS that is compatible with your Mac.2

Shift-Option-Command-R
Requires macOS Sierra 10.12.4 or later Reinstall the macOS that came with your Mac, or the version closest to it that is still available.

https://support.apple.com/en-us/HT204904