Q: FileVault stuck on "Encryption Paused"

Yes I had tried it and just checked again. The "Turn Off Encryption" option is greyed out and can't be clicked.

When I unlock the lock, "Turn Off FileVault" is active but when I click on it I get the following error message:

"FileVault is encrypting the data on your disk. Wait until your disk is fully encrypted before turning off FileVault."

Dear zinnjd, 

I had faced the same problem when i bought my brand new mac. It was stuck and said " Encryption paused. Plug the power adapter to continue". I went through all the forums i could find at that time and tried everything. Nothing worked.

Atlaast, i took my mac to the apple service centre and they just erased my disk and re-installed a fresh copy of yosemite for me.

Regards.

The steps listed by Fredrico resumed it for me too. After an initial slight delay. Be patient.

However, when completing, it goes back to "Paused, connect power.... " and doesn't provide the option to turn off vault.

To all with this issue,

Talked to Apple Support and they told me that it is a known issue and will be addressed in future updates or patch. Only thing you can do is wait for fix or reinstall OS X.

Did they say if there was any risk in just leaving it alone and waiting for the patch/ update? If no risk then I am inclined to wait rather than reinstall OSX.

Ok my quick story...

I purchased a brand new 15" RMBP last week. Started it up, selected FileVault as part of the OS X first run screens, boom! the "connect power..." problem that I didn't notice until after transferring about 200gb of various stuff and downloading the entire adobe suite...yay.

I tried the "Clear PRAM->Command R-> Unlock Disk-> Repair Permissions (Partition)->Repair Disk (Partition)->Repair Disk (Disk) 'solution' (Thanks Scafede) and managed to get it to encrypt after a short wait but it went back to "connect power..." when it started optimising. I'm maybe not as patient as some because after trying the 'solution' twice more I opted to backup to our other thunderbolt mac (which didn't take all that long), restore and NOT enable file vault as part of the first run.

Today I went to turn on file vault (because I actually enjoy the security of encrypting clients files etc.) and got the "connect power". ***!

Tried the 'solution' again twice and nothing, not even after waiting an hour or so for it to start. Then it occurred to me that I was running in clamshell mode so I opened the mac (left the monitor plugged in), re-ran the 'solution', and it has actually started encrypting again.

Now perhaps it was third time lucky with the 'solution', or maybe it's also a issue with clamshell mode.

Hopefully this info helps someone avoid the hassle of a restore, if in fact the steps I took produced anything except a random result!

Cheers

Silicont you inspired me to try Scafede's solution for the 20th+ time, but alas still the problem persists. It seems there are variables and randomness involved in the problem and the solution. <sigh>

I was able to stop the encrypting and start Decrypting by going in to disk utilities "select" the Hard drive then go to file menu and turn off encrypting.

Unfortunately, scafede's solution did not work for me.  I tried several times, including asof14's suggestion of going immediately into Recovery Mode after clearing the PRAM.

If I want to do a wipe/restore, can I make a Time Machine backup from this state?  Will I be able to restore everything (apps, documents, Homebrew packages, etc.)?

I just tried to turn on File Vault on a brand new MacBook Air that I'm setting up for my sister-in-law.  I started the encryption on battery and when prompted to plug it in, I did so.  It ran all the way into "optimizing" and then stalled with the message to plug it in...which of course it is!  I've tried rebooting and disconnecting/reconnecting to power.  I'll submit the bug report as recommended in two posts above and see where we go from here.  It seems really silly that we'd have a serious bug like this remaining in Yosemite a few months after the general release.  It was pre-installed on this Air and I made sure to apply all updates (only one) prior to doing anything else.

Argh.

Carmen160 ,

your our not alone in this as you can see, there seems to be many different levels of effect some more impacting then others, I had the same issue with my brand new Pro Book 2 months ago, I discussed with Apple and they are well aware said they are working on patch/update, the key thing is this .... " are you experiencing any degradation or  noticible Impact to your system"  ..... I have not experienced any impact at all, ether performance or functionality .... So I personally are wait for the fix ... Others have been successful in this forum with various implementactions of a get around..... Some have just taken their machine back to An Apple Store and had the Yosemite reinstalled by Apple with out encryption checked off .... That's how I see this after reading all the posts herein ......

Thank you, Fred.  I read all of the posts and came to the same conclusion.  This brand new MacBook Air seems to be working fine otherwise, so I'm leaving it alone and I'll give it to my sister-in-law as planned.  It is disappointing and disconcerting.

Ancient Geek (in Carmen160 clothing...)