rMBP mid 2012 is useless under High Sierra


i installed high sierra lately on rmbp 15" mid 2012, 2.7ghz quad core i7, 16gb ram ddr3l, 512gb ssd , since work turtle. slowing down, not apps, checked activity monitor. it's powerful machine should work well. have mac pro 2009 , high sierra flies on it. mid 2012 rmbp became useless point considering buying new one. read due potential bug in high sierra dual gpu on rmbp.

similar issues?

edit, similar issues reported below same no resolution...:
https://discussions.apple.com/thread/8220029
https://discussions.apple.com/thread/8164739
https://forums.developer.apple.com/thread/78733
https://forums.macrumors.com/threads/mid-2012-mbp-high-sierra-ultra-slow.2074433/
 

revert sierra.
 


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