The rumored Oct. 27 event of Apple is now official, with the company now having sent out invitations to journalists for a product unveiling at Apple's headquarters in Cupertino, California.

The invitation bears the words "Hello again," which is a nod to the original Mac that was introduced in 1984 with a simple "hello."

There is no mention on the invitation regarding the products that Apple will announce at the upcoming event, but there have been numerous rumors on what to expect. Here's a quick rundown of what we know so far for the Oct. 27 event.

MacBook Pro

The expected headliner for the event is the new MacBook Pro, which is said to feature a redesign that will make it look more like the Retina MacBook which was launched last year. It is about time for a MacBook Pro refresh too, as its base model has not been updated since June 2012.

The new MacBook Pro is rumored to come with 13-inch and 15-inch models, and will drop traditional USB ports in favor of USB Type-C ports. Other rumors surrounding the updated laptop is that it will come with an OLED touch panel at the top of the keyboard to replace the traditional function keys, along with Touch ID technology.

MacBook Air

The MacBook Air could also be getting a slight update in terms of USB-C ports and upgraded components. However, it has been said that the 11-inch model will be discontinued, with Apple moving forward with only the 13-inch MacBook Air.

iMac

Being a Mac event, it could be entirely possible that Apple will also unveil a new iMac with upgraded hardware. However, it is unknown if there will also be a redesign similar to what the MacBook Pro will receive.

iOS 10.1 And macOS Sierra

The two operating systems are also expected to be present at the upcoming event. iOS 10.1 is already available for beta testers, with the final version possibly to be announced on Oct. 27. The macOS Sierra, meanwhile, could finally be coming along a computer as its operating system right out of the box for the first time since it was announced a month ago.

AirPods

Remember the AirPods? The controversial replacement to the traditional headphones for the iPhone 7, which dropped the 3.5mm headphone jack in favor of a Lightning port, is said to be going on sale in October. Apple could be announcing the arrival of the AirPods at the upcoming event.

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