Recently, we’ve done a couple of features on the core tools and skills needed by IT professionals who support and manage Macs and iOS devices in business environments. Knowing what those tools and skills you need is a step in the direction to becoming a killer Mac tech or multi-platform sysadmin, but to really succeed, you need to acquire those skills and learn how to use the appropriate tools.

There are a range of training options available with price points ranging from free online resources to professional IT training companies and Apple-authorized training centers. Which options (or mix of options) are best for you will vary depending on your learning style, the skills and experience that you already possess, and your budget.

In this feature, we’re going to focus on some of the best low-cost (and no-cost) options out there.

It’s looking increasingly likely that when Tim Cook takes the stage at the annual WWDC keynote on June 11th, Apple will announce new MacBook Pros and possibly iMacs, and if the rumor mill is to be believed, these new machines won’t just be slimmer and ditch their optical drives… they’ll be the first Macs with Retina displays.

What everyone widely expects from Retina display Macs is an iPhone or iPad-style resolution doubling. So if the current 15-inch MacBook Pro has a 1,440 x 900 display, the Retina 15-inch MBP would have a 2,880 x 1800 display.

What the rumor mill is missing is that there’s no benefit to Apple handling a jump to Retina display Macs this way. The reason the iPad and iPhone going Retina was such a big deal was because they had really pixellated displays. Before the iPhone 4, the iPhone had a display that was only 53% close to being Retina. The iPad was slightly better, at 61%. Roughly, both the iPad and iPhone were only about halfway there, which made the easiest fix to just double the amount of pixels per inch.

But Apple doesn’t need to do this with its line of Macs. In fact, it’s likely that most “Retina Quality” Macs will have fewer pixels than your new iPad. Here’s why.

Apple has given its Premium Reseller across the United Kingdom authorization to discount £100 (approx. $160) off all Macs when customers trade-in their old machines. The Think Green scheme will run until June 17, and some believe it could signal Apple’s effort to shift existing stock before its next-generation MacBook Pros make their debut.

Ask what the next revolutionary feature for the iPhone will be, and NFC is a common answer. NFC — or near-field communications — is an ultra low-power chip that allows two devices to communicate small strings of information within a couple feet of each other.

Why’s it so revolutionary? The most commonly cited “magic” that NFC would bring to the iPhone would be the ability to use your device to pay for goods and services, just like a credit card.

In other words, instead of pulling out your wallet to buy groceries, get onto the subway or pick up a MacBook at the local Apple Store, you’d just tap your iPhone against a point-of-sale terminal near the register instead. The NFC chips in both would communicate and you’d be on your way, no signature or PIN code required.

Pretty neat, huh? NFC would theoretically allow Apple to take a cut of real world sales made of even non-Apple products. They’d become a mobile payment company. That seems like such a no-brainer that everyone from Bloomberg to The New York Times.

The only problem? Never going to happen, because Apple has already deployed its mobile payment solution, and it’s hidden inside every iPhone 4S that has already been sold.

Apple today issued an update to its third OS X Mountain Lion developer preview. The update (Build 12A206j) can be downloaded now by registered Mac developers.

The second update to the latest Mountain Lion developer preview doesn’t seem to contain anything substantial, but Apple is obviously gearing up for the public release of its next-gen desktop OS this summer.

Apple’s upcoming lineup of MacBook Pros are expected to feature a slimmer design, Intel Ivy Bridge architecture and jaw-dropping ‘Retina’ displays. Like the last two iPhones and newest iPad, Apple’s new MacBook Pro and iMac models are supposed to flaunt a screen like you’ve never seen on a computer before. And if iOS device marketing is any indication, such a display will likely be the flagship feature in new Macs. Apple is expected to unveil the new MacBook Pros at WWDC next month, according to multiple reports.

If the next MacBook Pro and iMac really do come outfitted with gorgeous Retina displays, then the new screens will cost Apple more to make.

While there’s plenty of debate surrounding the next-generation iPhone’s specifics, there’s one thing we do know for sure, and that is that the new device will make its debut at some point during 2012. In preparation for that, Apple has cut existing iPhone orders by around 25%.

With Apple’s entire family of iOS devices now kitted out with high-resolution Retina displays, it’s time for the Cupertino company’s Macs to get the same treatment. We’ve speculated about Retina display MacBook Pros for some time, but there’s been little mention of a high-resolution display for the iMac.

But fear not. Those of you with a love for Apple’s all-in-one won’t get left behind when the Retina display upgrades begin their rollout.

Today has been a huge news day for the MacBook Pro, but the rumormill isn’t done churning just yet. A new report is claiming that Apple will release updated MacBook Pros this summer and that they will make the switch from using AMD GPUs to Nvidia graphics.

Late this afternoon The Verge confirmed Joanna Stern’s report that the new MacBook Pros will feature new Nvidia graphic chips. The report cannot confirm which specific chip will be used, but it is believed to be similar to the 28nm GeForce GT 650M – a chip that provides similar power and performance efficiency to the 28nm GeForce GT 640M.

Earlier today we showed you that Apple was working on bringing the iOS Notes and Reminders apps to iCloud.com, and Apple has since removed the evidence from beta.icloud.com. After others have dug around to see what Apple is up to with its iCloud beta URL, an interesting find shows a new iCloud developer icon.

It looks like Apple is working on new iCloud developer tools or at the very least some sort of web portal for devs to access beta iCloud features. Will we see new iCloud features at WWDC this summer?