The new Continuity helps you hand off tasks from iPhone to iPad to Mac, but that feature and Yosemites updated hardware requirements, such as Bluetooth 4.0, push you deeper into Apples ecosystem.

Pros Beautiful but familiar design: Launch Yosemite and youll appreciate the familiar, easy-to-navigate interface, modernized with flatter, iOS-style icons.

Better notifications and search: The once disdained notification bar has become incredibly useful.

The events and notifications bar slides out, like iOS 8s, with customizable, drop-down widgets, revealing the native Weather, Calendar, and Calculator apps.

Spotlight search pops out and lets you launch apps, find files and folders, and even search the Web, similarly to the popular standalone app Alfred.

Continuity is amazing: Sharing photos and videos over iCloud is as easy as dragging and dropping.

Airdrop lets you transfer files directly to your iPhone or iPad.

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If you own an iOS device that can upgrade to iOS 8, Handoff (aka Continuity) is a must-have feature.

Make calls on your Mac, send SMSs to non-iPhone users, and finish documents and emails begun on your iPad from your desktop.

Fluid and fast: In our tests, the overall OS experience was fast and functionally stable, with most apps launching quickly and acting responsively.

Additionally, Spotlight makes search much more intuitive and effective.

Cons App incompatibility: Certain apps dont work with Yosemite, including enterprise applications like Cisco VPN, Parallels, and VMWare Fusion, which will not operate properly until updated patches are released.

Steep hardware requirements: To get the most out of Continuity, your Mac must be running fairly new hardware, the most important being Bluetooth 4.0 for the coveted Handoff feature to work.

Yosemites new font, Helvetica Neue, gives your desktop a cool new look but is hard to read on smaller screens or non-Retina displays -- watch out, Macbook Air users.

Buggy: Apples latest OS is still buggy almost a month after its official release.

The most widespread issue is reconnecting Wi-Fi after your machine is put to sleep.

Also, Handoff can be hit or miss.

We were able to get our devices up and talking, but others werent so lucky.

Although we loved the ability to take our work from mobile to desktop, we wish that Apple would play more nicely with competitors software.

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Bottom Line With Yosemite, Apple made the Mac OS a bit slimmer and faster while keeping the familiar feel that users love.

Overall, OS 10.10 is a stable and responsive operating system -- when it works.

If you already own iOS 8-ready devices andor the latest Mac, upgrading is a no-brainer.

Folks with older systems or those without iOS devices will have to weigh the benefits of upgrading.

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