When Time Machine isn’t Working in Yosemite

My Time Machine isn't working on Yosemite OS

I have recorded how I upgraded my Mavericks based Mac to Yosemite newest OS which was released not too long ago.

However, right after I upgraded, I found a strange thing happening with my Time Machine.

My Time machine isn’t working anymore. When I plugged in my external hard drive to my Mac, it was detected on Finder, (if not, this link might help) but it was circle-ing all the time, and in my menu bar on the top right, showing “Preparing Backup” or “Backing Up from xx to xx GB”, it takes forever than usual.

Read moreWhen Time Machine isn’t Working in Yosemite

How To Upgrade Mavericks to Yosemite Mac OS X

Yosemite new appearance

I was attempted to try Yosemite OS X beta a few weeks ago in a VM on my Mavericks Mac, using Apple developer account, however I didn’t have time to install in a Virtual Machine, until yesterday, I’ve received an email that Yosemite OS X is released and free to download in App Store, for people who want to upgrade Mavericks to Yosemite OS X.

So I went to open the App Store, and yes, it was there. So I made a full backup of my Mac first, and while backing it up, I google about this new Mac OS.

Found some people want to downgrade or revert back to Mavericks, and it made me downloading the Mavericks.

Read moreHow To Upgrade Mavericks to Yosemite Mac OS X