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I love Mavericks. It's by far the best OS Apple has produced, ever. I haven't found a single thing I dislike.

I must admit however that I skipped Mountain Lion, went straight from Lion. So it was a much bigger jump for me.
 
I think Mavericks looks better. Calendar looks better, in my opinion, for example.
 
Pure black on pure white is kind of jarring. Usually a designer will use a very dark grey instead of a pure black (and usually that grey will have some sort of color cast rather than just being a lighter value of pure black).

Apple is sort of bucking a design trend here. Sometimes when Apple does that, it becomes the new trend. We shall see.
 
After upgrading to Mavericks I was using the Contacts app, and thought to myself "This is effing ugly!" Black text on a white background. The entire app is a plain, boring, ugly black and white. It looks like something from a Linux desktop 10 years ago! The new iBooks? Black and white. Calendar? Black and white. This black and white insanity is pervasive in iOS 7 as well. Reminders? Black and white. Music? Black and white. Safari? Black and white. Notes? Black and white.

Is it just me or is Apple loosing it? As entrenched as I am in the Apple ecosystem, I have been researching Android phones, and am definitely considering one. I was considering an iPad mini for my 4 1/2 year old (who currently uses my old iPad 1). But instead of adding kid friendly features to the new iPads like the Nexus 7 and Kindle Fire have, Apple increased the price to $400. Well, I plan on getting my kid either the Nexus 7 or Kindle Fire HD for $129, both of which allow you to create a profile for a child and control which apps they have access to, along with other kid friendly features. I plan on taking the money I save and put it in his his college fund.

Apple is loosing it. And since they don't listen to their customers, I plan on making a statement with my dollars.

Do what you gotta do for you. Apple will be fine.
 
Calendar, Contacts, iBooks and Notes all look positively awful and unfinished. It’s as if they panicked and quickly removed the skeuomorphism but didn’t have a good design replacement in the works. These apps truly lack personality and are not attractive at all. I only buy and use attractive (and functional) software – I would never buy any of Apple’s current iCloud apps. Unfortunately I am deep into the Apple ecosystem and now rely on just about all of them.

Books looked great on those unobtrusive light wood shelves. It was clean and organized and didn’t get in the way. Flipping through pages and pulling down a silk bookmark made it an enjoyable experience on the iPad. It was a great combination of the real world and the virtual world. iBooks is just a plain window now showing boring thumbnails of your books.

In Calendar, why aren’t days in closed ‘boxes’, like, you know, a calendar? Calendars, Books and Notepads are still all around us in ‘real life’, so there is no reason why apps shouldn’t resemble and operate like them. Should the developer of the awesome ‘Djay’ app remove the turntables and buttons?

Not sure why it had to be extreme use of skeuomorphism then the complete lack of it. Some love it, some hate it, but with any opposing thoughts, logic and reason usually fall somewhere in the middle. I hope that Apple can learn to live somewhere in the middle. There is no reason why OS X should look like iOS 7. They are two different operating systems used in completely different ways on different devices.

Skeuomorphism aside, they could have designed these apps better. They definitely lack that Apple polish that we’ve all grown used it. Apple took it a bit too far, they could have toned them down tastefully. Same goes for the missing subtle textures throughout Mavericks as you reveal dashboard, notifications and mission control, etc. The plain grey is very cold and boring. I think it looks tackier than the linen. Bring on the tasteful and subtle textures and photorealistic icons.

Retina displays can’t just be for sharp text and plain boring finder windows. I like to be visually stimulated while using my Mac. Fun little niceties throughout that put a slight smile on your face while enjoying or creating your content. It’s a nice change to come home to after starring at the awful Windows 8 and Google interfaces all day at work. Hard to believe that Apple is following this ‘flat and boring’ trend. Leave the serious trendy flat stuff to Microsoft and Google. Apple’s roots were about being different. It looks like they’re slowly trying to blend in due to the popularity of the competition.
 
Apple is rethinking the GUI. The content, mainly your photo's, video's, music and the internet are the new GUI.

If you look at iOS7, your wallpaper is brought everywhere in your iphone. Almost everything is semi-transparant, so the content come through it.
 
Mavericks was free, now I know why. Some good features, but I was expecting so much more. They could have shown more finesse with stock apps in OS X. Doesn't bother me so much in the OS platform, but in OS X it does as I use them all the time. To me, they look unfinished and bland, especially Calendar. Wish I could have the old Calendar and Notes back, but I'm not going to reinstall ML. Hopefully they will finesse them with the next update.
 
After upgrading to Mavericks I was using the Contacts app, and thought to myself "This is effing ugly!" Black text on a white background. The entire app is a plain, boring, ugly black and white. It looks like something from a Linux desktop 10 years ago! The new iBooks? Black and white. Calendar? Black and white. This black and white insanity is pervasive in iOS 7 as well. Reminders? Black and white. Music? Black and white. Safari? Black and white. Notes? Black and white.

I see your point. Most of the Mavericks reviews are saying that this is a odd release. OS X is stuck in an "in between" stage. Apple tried bringing the look and feel of iOS 6's skeumorphic design into OS X. Now we are moving away from that but it's not clear what we are moving to.

I think Apple needs a bit more time to figure this out. I'm sure they are struggling with it too.

I agree with you that the monochrome-ness of the OS overall is ridiculous. The apps you listed, the Finder, most tool bar buttons. It's much harder to find the stuff you need to use/click on when all icons are the same grey color. I'm all for "deferring to content" but I think they've gone a bit far.

Not to mention that many have Retina screens to display all these brilliant black and white UIs...

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Apple is rethinking the GUI. The content, mainly your photo's, video's, music and the internet are the new GUI.

If you look at iOS7, your wallpaper is brought everywhere in your iphone. Almost everything is semi-transparant, so the content come through it.

I agree. The first pass at this was iTunes pulling colors from album art. I can see Apple doing more of this...sort of making the OS change it's form along with your content.

Time will tell if this works well for users.
 
Well, at least I'm getting some colour with the frequent split second spinning beachballs since upgrading to Mavericks ha ha ha
 
After upgrading to Mavericks I was using the Contacts app, and thought to myself "This is effing ugly!" Black text on a white background. The entire app is a plain, boring, ugly black and white. It looks like something from a Linux desktop 10 years ago! The new iBooks? Black and white. Calendar? Black and white. This black and white insanity is pervasive in iOS 7 as well. Reminders? Black and white. Music? Black and white. Safari? Black and white. Notes? Black and white.

Is it just me or is Apple loosing it?

I agree with you on the design point that it's ugly and it seems Apple is losing it (the great user interface design) but I don't think Android is any better either.

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Take a look at this Vid...

http://www.youtube.com/watch?v=l5yEI7l5zpQ

Its a great vision of the future and iOS7/Mavericks and Apples vision fit nicely.

Some people don't like to simplify but I enjoy it and embrace it.

Well, that interface is beautiful, unlike iOS 7. There is beautiful minimalism and there is ugly minimalism.
 
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