No, not Mountain Lion, though that’s kinda important, too. (Official Heathen rec: As with all major upgrades, wait 3-6 months.)

I mean the all-important question of “what virtualization platform to use?” Since the Mac platform migrated to Intel chips, it’s been possible to run Windows in a window at near-native speeds — I do it all day, even running SQL Server and IIS locally, with completely acceptable performance.

Now, your needs probably aren’t my needs, but few are the Mac folks who don’t have at least one Windows holdout program they can’t quite get rid of. (For my mom, it’s Quicken, for example.)

Up to now, the go-to options for non-techie types were VMWare Fusion, from a company that made its name on server-side virtualization in high-availability environments, and something called Parallels (no link; keep reading for why) from a company that just does Mac desktop virtualization. For me, that choice has always been pretty simple: Go with the guys who do this for a living on lots of levels. They know more.

Historically, Parallels has performed pretty well, too, and in some areas was actually better than Fusion (mostly graphics, which doesn’t matter to me). I generally gave no recommendation to folks beyond “pick whichever of these is on sale.”

That’s no longer true. Parallels, apparently, actively spams its users with in-app advertisements and sales pitches, and makes it very difficult to turn this off, even to the point of deleting messages on their support forums sharing the command line (!) required to do so.

Their statement on the subject is a cornucopia of weasel-words and bullshit:

We use in-product notifications to share several types of information with our customers. First, and most importantly, we share information about product updates which are generally related to compatibility with OS X, new features and product enhancements. Second, we occasionally share special offers from Parallels or other third party companies who provide special deals for our customers. Many of our customers rely on the information about product updates and appreciate the special deals for products that are of interest to them.

Individual notifications can be turned off by clicking the “don’t show this again” button. However, because customers need to receive important product information, there is not a mechanism for customers to completely disable notifications.

This, of course, is a lie; there IS a terminal command you can issue to disable it. That line is:

defaults write com.parallels.Parallels\ Desktop ProductPromo.ForcePromoOff -bool YES

Parallels isn’t shareware or freeware. It costs real money — typically about the same as Fusion, which is nearly a hundred bucks. It’s absolutely inexcusable that they’re insisting on this spamming behavior, and doubling down by (first) lying about the fact that it CAN be disabled and (second) trying to keep people from discovering this truth.

Do not buy Parallels. Send your dollars to VMWare. They’ve had plenty of time to address this; it’s clear this behavior is deliberate, and that they have no intentions of changing. Vote with your money.

(h/t: Fireball.)