user34795: I used Bitcoin-qt (Bitcoin Core) on desktop to create a wallet a while ago and I'm a little confused how it works. 
I never fully "synchronized with the network" I'm assuming that means download the entire blockchain. I'm about half way there and 30gb deep. I created an address to receive a transaction but don't have a balance in the wallet. I'm assuming it's because it's never caught up with where my transaction is on the blockchain. Is this correct?
I can see when I take the address and look it up online the transaction of receiving the funds I just can't confirm a balance.
It doesn't seem that there's any password that I ever put in either. When everything does sync can I only transfer my balance out using the same app?
Also I had to replace my hard drive on my mac recently so I took both the Bitcoin app and the Library/Application Support/Bitcoin folder and put them on my new hard drive, are there any other files I would need to get access to my balance?

user2306: 
I'm assuming it's because it's never caught up with where my transaction is on the blockchain. Is this correct?

Yes.

I can see when I take the address and look it up online the transaction of receiving the funds I just can't confirm a balance.

That's normal, if your client is still synchronizing.

When everything does sync can I only transfer my balance out using the same app?

No, it's possible to use a different Bitcoin wallet. You need to 'export' the keys in your wallet to another program. See How can I export the private key for an address from the satoshi client?

Also I had to replace my hard drive on my mac recently so I took both the Bitcoin app and the Library/Application Support/Bitcoin folder and put them on my new hard drive, are there any other files I would need to get access to my balance?

Is there a file inside there named 'wallet.dat'? If yes, then you have what you need to spend your Bitcoins. If no, then no.

34795: <p>I used Bitcoin-qt (Bitcoin Core) on desktop to create a wallet a while ago and I'm a little confused how it works. </p>

<p>I never fully "synchronized with the network" I'm assuming that means download the entire blockchain. I'm about half way there and 30gb deep. I created an address to receive a transaction but don't have a balance in the wallet. I'm assuming it's because it's never caught up with where my transaction is on the blockchain. Is this correct?</p>

<p>I can see when I take the address and look it up online the transaction of receiving the funds I just can't confirm a balance.</p>

<p>It doesn't seem that there's any password that I ever put in either. When everything does sync can I only transfer my balance out using the same app?</p>

<p>Also I had to replace my hard drive on my mac recently so I took both the Bitcoin app and the <code>Library/Application Support/Bitcoin</code> folder and put them on my new hard drive, are there any other files I would need to get access to my balance?</p>
 2306: <blockquote>
  <p>I'm assuming it's because it's never caught up with where my transaction is on the blockchain. Is this correct?</p>
</blockquote>

<p>Yes.</p>

<blockquote>
  <p>I can see when I take the address and look it up online the transaction of receiving the funds I just can't confirm a balance.</p>
</blockquote>

<p>That's normal, if your client is still synchronizing.</p>

<blockquote>
  <p>When everything does sync can I only transfer my balance out using the same app?</p>
</blockquote>

<p>No, it's possible to use a different Bitcoin wallet. You need to 'export' the keys in your wallet to another program. See <a href="https://bitcoin.stackexchange.com/questions/4203/how-can-i-export-the-private-key-for-an-address-from-the-satoshi-client">How can I export the private key for an address from the satoshi client?</a></p>

<blockquote>
  <p>Also I had to replace my hard drive on my mac recently so I took both the Bitcoin app and the <code>Library/Application Support/Bitcoin</code> folder and put them on my new hard drive, are there any other files I would need to get access to my balance?</p>
</blockquote>

<p>Is there a file inside there named 'wallet.dat'? If yes, then you have what you need to spend your Bitcoins. If no, then no.</p>
