Is Nimzowitsch's "My System" obsolete in today's chess?

the engines evaluation is tactical evaluation , it cannot give positional evaluation . the honour for positional evaluation is still with us , humans .

the strong side of engines are calculation and defence . they can come up with bizzare-looking ideas in certain positions .the weakeness are positional evaluation  . 

use the engine to check games however reserve the final decision for yourself . the engine may claim certain move of GM as weak/mistake but it will infact be strong move i.e positionally . 

"... What has changed in eight years? In 2003, pc programs were already roughly on a par with the human World Champion, but they achieved this level by being much stronger in tactics whereas they were only at strong amateur level positionally. Now the best programs are far stronger still tactically, but vastly better positionally – maybe in the low grandmaster range, though this is very subjective. ... I do on occasion disagree with the engines (even my own) and substitute my own analysis, but I generally only do so when I am fairly confident that the engines are wrong. ..." - GM Larry Kaufman (2011)
https://www.newinchess.com/Shop/Images/Pdfs/955.pdf

The hell they can't.

Your OP overlooks the fact that "My System" is a book about concepts, not about specific variations. Buy ECO for that.

Nimzovich's book can teach you things that you will never learn by staring vacantly at a computer monitor.

When people ask me about chess books, there are only two that I recommend almost regardless of the player's strength... from 1400 to 2400:

Nimzovich's "My System" and Kmoch's "Pawn Power in Chess"

Nimzowitsch wasn't perfect.  Since it was written before the computer era, it's entirely possible that he had the occasional tactical oversight.  A modern book that is engine-checked will not have that weakness.

However, that does not interfere with its ability to explain concepts that are still as valid today as they were in his day.

Since most of our games are not played against computer engines,the principles earlier humans used to beat other earlier humans, are as valid today as they were decades ago. Maybe at Super-GM level My System is obsolete, but lesser beings can still learn a lot from these books.

"My System" is the only chess book I have read thus far. Its an incredible introductory to intermediate-level book. I highly recommend it, and make sure to take your time reading it!

Don't treat it like a repertoire book but instead more like a book about chess principles. It also has historical significance.

http://theweekinchess.com/john-watson-reviews/john-watson-book-review-108-of-eplus-books-part-2-nimzowitsch-classics

you got a book for life there , its going to be a much treasured much read reread , i hope in your whole library

I've found the same thing with this book, and also the Kmoch book. In some cases they will say that a position is winning for White (for example)  because of some positional feature, then show the moves that were actually played, and show White going on to win. So I'd set the position up and the engine would say the original position is dead level. Then I play through the moves and the engine would show that at some stage Black plays a blunder and the eval now shows White winning.

So I figured that either the GM Author was wrong, or Stockfish was wrong - either way the positions were way over my understanding so I went in search of easier material!

Mein System is for novices?? I've never heard this before.

Is Nimzowitsch's "My System" obsolete in today's chess? 

No.

This early work has now piqued my interest.

I have a modern version of this book and found it quite instructive. Especially the parts on development tempo, pawn play and rook endings. It's probably a century old or close to it, but I did learn from it. He would still be a strong player today with century old knowledge I bet. Better than me that's for sure. I also remember browsing youtube about the book once and there is a guy that made videos, chapter for chapter, which might be good for those that don't have the book. This is the link https://www.youtube.com/watch?v=yLrNC9Rskww&list=PLW-ubDuosu7UKDXI6KF7XIMdzaStaVEIL 

@slow_pawn: thanks!!

Bear in mind that there was very little chess literature around at the time it was published. Nimzowitsch's ideas, which are now so well discussed that they seem to be almost trivially true, must have seemed genuinely revolutionary to all but the very strongest players. As others have noted above, My system is about concepts which apply now as much as they did then. Maybe one or two instances of tactical analysis in the book can be shown to be flawed but the key ideas are as important now as they ever were.