I am using a Windows 10 laptop. The owner of a high-end store told me that he uses a Mac, and I should, too.
Neither one, on its own, is a solid choice for directly feeding a DAC. But by introducing a quality re-clocker between the laptop (or Mac) and the DAC, that changes everything for the better.
I have no personal experience with a Mac. The high-end store's owner told me that it is better than a Windows PC, but still needs a re-clocker due to electrically generated noise (from the Mac) and jitter (from the Mac). Less so than from a Windows laptop, is my understanding.
While researching a good re-clocker (digital-to-digital converter (DDC)), I came across a couple of candidates that were on my short list:
-- Singxer SU-6
-- Denafrips (I do not recall which model)
But I ended up purchasing the Berkeley Audio Design, model Alpha USB Series 2.
There is a reference model, too, that is twice the price of the Series 2.
If I had the means, I would have gone for the reference model. But the Series 2 model is outstanding.
A significant cost went into my choice of digital cables. If not for their high cost, I probably would have purchased the reference model.
I have no mass produced digital cables for comparison. So maybe I spent more than necessary. But it has been my experience that cables matter, including digital cables. And the reviewers of these products also used quality digital cables. That influenced my decision.
So what machine (examples of models, known best bang for buck) should go between terrible computer and DAC?
I gave a couple of examples, above. I have never heard them. But until I purchased my Berkeley DDC, I never heard it, either. The Berkeley's review was accurate. I can't speak for the others. But the others got very good reviews.
As far as best bang for the buck, that is too subjective. I suggest that you read the reviews, and try to determine which one's sound quality would be a good fit for you and your budget. It is a difficult decision, without being able to hear each of them with your own ears.
I listed my Berkeley choice, and two other brands. But there are several other brands that make DDCs. I believe that the three that I considered are among the best. But, again, based on reviews. I have no way of listening to each of them, short of buying all of them (which is not doable for me).
Be sure to factor in the type of ports on the DDC. Make sure there is the right one that is compatible with your DAC. And then begin your cable-choice journey, and budget, accordingly.

