Bitcoin Forum

http://i.gyazo.com/0bad1a717bb7160c54e97391a1d6244d.png

I just upgraded my OSx to 10.10.2 from 10.9 which was mavericks.

That is the error I see now, I don't know what to do now?


please help theres a lot of money there...


Thank you.

I hope you made a backup and wrote down the seed before loading that much money on it. If so, then take a deep breath, you'll be fine.

Did you make backup?

If not, OUCH!  :'(

Hi i have the wallet.dat file on this mac,i found it in application support.
How do i load it inside other wallet?

i can't use qt bitcoin client because its 20gb like it says for download at least...atm i just want to know how to 'know' that i still have the coins...
can't wait for 20 gb on my darn slow connection...


or is it that if i import this wallet.dat inside bitcoin qt it ill show up my coins without even syncing?

any other way to load this wallet.dat and know immediately the balance inside without waiting for sync?


any other client that can use this and help immediately?



BTW, I DID NOT DO A FRESH INSTALL OF YOSEMITE, IT WAS ON MAVERICKSK ITSELF SO ALL MY FILES ARE INTACT....which means the wallet.dat file should work right?
since its the same thing as before don't you think?



please help me asap, I'm really scared :(

Do you have your seed with you? This is 12 letters long and you should have either memorized it or written it down somewhere. Even if you don't have it, it should still be possible to recover your wallet as long as the files weren't overwritten but it might not be easy.

EDIT: Perhaps you can try downloading Electrum Portable, running it, and then replacing the wallet.dat it creates with your copy of wallet.dat?

EDIT 2: Not sure if Electrum Portable has an "import" feature but if it does then that could work also.

I have the seed
i screenshotted it

but it was saved in JULY 2014

but it was for the same wallet i used, the electrum one...will it work? will it restore all coins ir will it only replace coins that were there inside at that time?


BTw, the electrum on mac is really bad,  it saves in /library/appicationsupport/bitcoin

folder - i mean the wallet.dat one...



so I am even scared to download or install other BTc clients right now...because like I know qt client also does it on the same location\


OS X users, can you please confirm this is true?
because i could not find any electrum folder in library/appicationsupport

only found biotic  folder with wallet.dat

which is 5.39gb big


can electrum application folder be so big? i sure hope yes  :'(

otherwise this might just be the files from qt client i installed few months ago...

The seed is deterministic (contains all the information needed to generate all current and future addresses) and never changes for a single wallet, so it should work. As long as it's the same wallet, then all your coins should be there.

hi sorry for the bad post let me edit this

okay electrum doesn't have separeate location for wallet.dat

i think its the same as qt client

in appsupport/bitcoin

so wouldn't installing qt client over write to replace the thing or folder and eventually waller.dat file?


any OS X users?

if you are not on yosemite 10.10 yet, can you please tell me if there is any separate electrum folder in

library/applicatiocaches/bitcoin folder?

You can use Bitcoin-QT. Start it, then close it (Best is when you do it offline. Search for --> offline wallet)
Replace the wallet.dat with your backup
Start Bitcoin-QT again
Start Console
Dump your PrivKeys and
Close Bitcoin-QT
Start Elektrum
Import PrivKeys

Since you dumped your PrivKeys (unsecure) and Elektrum will not provide seeds for imported PrivKeys you'll be more safe sending the BTC to a new Elektrum wallet with seed for a better recovery.

Did I help you? Drop some BTC here: 1CbA6fjN6H9gyovuexGMmpfUKWiZsSF4Vj

Why are you afraid mate , just put back the seed  , tell me that you have it tho :o Yes It will restore all your coin unless you imported new adresses to the Electrum wallet then It won't import coins of those new adresses
Otherwise I don't think there is other solutions if you didn't take any backups of Private keys or wallet file .

Or just use the wallet key tool and convert it to a .key or .wallet file, and use Multibit temporarily.

man i don't have bacon qt an i'm scared to install it since it will overwrite it, please read my post above..

i have the see but how does anyone import addresses?

i only used the RECEIVE addresses that were mentioned inside the electrum wallet..
\





Where can I get such a converter?

Electrum works differently than bitcoin-qt. It doesn't randomly generates new addresses like B-QT but produces them off the seed in a deterministic way (but yet unpredictable for someone who doesn't have the seed). The seed is all you need to recover your addresses. If you are uncomfortable using this mac, install electrum on a different computer and restore from the seed.
Once again, as long as you know the seed you haven't lost anything. All is good.

That's true. In fact, I've had numerous times when I reformatted my computer, deleted anything related to Bitcoin, and then started over again. The only thing I had to gain access to my bitcoins again was the 12 word seed in my head.

1. backup wallet.dat to USB memory just in case.
2. reinstall electrum with the latest Electrum from their site. (don't worry, Electrum does not overwrite old wallet files EVER)
3. choose to restore wallet
4. insert the 12 word "seed" phrase. (or a 32 character long hex code that looks something like "0123456789ABCDEF0123456789ABCDEF")
5. You'll have your bitcoins.


By the way, what version of Electrum is it?

Electrum's default name for wallet files has been "electrum.dat" and then "default_wallet" since 1.8 so a file called "wallet.dat" must be very old...

You have the seed ? :o Well you are totally fine then mate !
Just unistall it and Install Electrum again . It will ask you to Restore from a Seed that you have , you select that option , put the seed and you are ready to go . nothing more simple then that

Looks like it's getting more and more complicated. First thing first, you mentioned earlier in your post that you have the seed. Use That!

Get somebody who has same version of mac os installed. Get electrum installed on that computer and recover your coins with the 12-word seed that you have.

I am not sure why so many people are talking about a wallet.dat file or QT. Neither of these apply to the OP if he is using electrum. The above is correct, all you need to recover your wallet is the seed.

If you are unable to get electrum to work on your computer then I would suggest doing the following

1 - Read up on PGP, find a gpg keychain manager (that you are sure you can trust) and install it on your computer.

2 - Choose and install a new wallet service (perhaps multibit or blockchain.info).

3 - Find a very reputable escrow service on the forum with a lot of positive trade experience.

4 - Message them with your problem and ask them if you can give them your seed, and they will return the bitcoin that is in the wallet controlled by your seed.

5 - Once you find someone very trusted that can do this encrypt a PGP message to the escrow with your seed

6 - give the escrow a newly created address from your new wallet service in step 2

7 - you now should have control of your bitcoin again

I don't know much about this. What if someone discovered your seed? 12 words is secure?

Yes, 12 words is secure enough so that it would be near impossible for someone to guess (or attempt to mine) your seed.

If someone discovered your seed then the result would likely be the same as if someone discovered your private key - your funds would be taken from you

But private keys are stored _encrypted_as wallet.dat files, not a dozen words you might be foolish enough to write down and put in your drawer

There is no rule that says you need to write down your seed. You can (and many people do) save their seed as a text file and then pgp encrypt the message/text file. Additionally in the event that your computer is damaged to the point that you cannot recover any data, you can easily access your wallet via your seed (if you need write it down and keep it in an actual safe place)

it would be safer just to get a virtual machine up and running and install electrum on that and import the backup via the seed.

so....did you recover them?

I like to know this as well.  This is one of the reasons that i'm worried about using a client like electrum even though i read its pretty safe.

Yes, well sort of...

Electrum doesn't use a wallet.dat file although I think earlier versions did (and even back then, I'm not sure if it was compatible with the official Qt client's wallet.dat). I'm currently using the portable version of Electrum and the program creates a folder in the same directory with a file called "default_wallet" located in the "wallets" subfolder. This file works in pretty much the same way as wallet.dat does in the Qt client and you can encrypt it or create backups of it if you want to. Those who are running the non-portable version of Electrum would have the wallet file stored in their user directory.

Let this be a wake up call to you and all other crypto users.. Always make backups of your wallets.

I have lost a small amount of BTC (~0.05) by accidently deleting wallets and not having copies of them or the provate keys.
The nature of crypto dictates that you should always prepare for the worst and have multiple backups of your privkeys in safe locations.
Paper wallets in safes are a great idea, so is having a USB drive locked away with all of your private keys as well.
Practice security and common sense at all times to avoid things like this.

As long as you have the phrase, then no matter what happens to your computer, is it 100 percent fine?


What happened to the phrase?  Did you wrote it down but left it somewhere?

As a new Electrum user, this sounds like a horror story.  :o

Why weren't you able to recover everything with the seed, considering it is meant to serve that purpose?  ???

Yes, the Op could've simply added the 12 word phrase on his Mac or any other computer and his wallet would be restored.

Quoted for emphasis!
Make a copy, put it on a USB stick (or other media). Put that screenshot with it for safe keeping. Now you have your private keys and your seed (password).
No matter how badly you may botch things on your computer you will be fine if you have these. However if you loose either of these, you are hopelessly screwed.