I have been running the bitcoin core successfully for months on an external 1Terabyte drive connected to a MacBook Pro.  Accidentally, the hard drive disconnected from the USB port. I now get this error:

  ./bitcoind
  dyld: Symbol not found: __ZN5boost10filesystem4pathdVEPKc
  Referenced from: /Volumes/Brown_Fam_Back_Up/bitcoin/src/./bitcoind
  Expected in: /usr/local/opt/boost/lib/libboost_filesystem.dylib
 in /Volumes/Brown_Fam_Back_Up/bitcoin/src/./bitcoind
  Abort trap: 6

Any ideas to repair are greatly appreciated.

I have searched the forum and there is talk of using a file called Bitcoin-Qt but I cannot find it.
Also, where are the core data files kept?

Thank you,

I would like to be able to pull historical daily bitcoin price from an API like coinbase.
I created this simple python file to retrieve realtime bitcoin price and print to screen every two seconds:

Can anyone direct me to a URL that pulls historical daily bitcoin price so i can save it to a file?

from time import sleep
from datetime import datetime
import requests
import json

while True:
    response = requests.get('https://api.coinbase.com/v2/prices/BTC-USD/spot')
    data = response.json()
    x = (data["data"]["base"])
    y = ( data["data"]["amount"])
    print(' =======================')
    now = datetime.now()
    current_time = now.strftime("%H:%M:%S")
    print("Current Time =", current_time)
    print (x + ' ' +  y)   
    sleep(2)

I am trying to understand the fees for buying Bitcoin on Coinbase. 
1. Their website talks about a 1.49% bank account fee. 
2. It also talks about a 0.50% spread fee for trades.

Do both 1 and 2 from above apply if i buy from my checking account that is linked to Coinbase?

Thanks,

Great information and very educational - thank you very much - I executed every example statement and learned a lot.

to run commands like:  getrawtransaction and decoderawtransaction, does the blockchain have to fully downloaded?
I am at about 74.6% this evening.

I get this error:

I also get an error with this command:

I am running these commands in the subdirectory /bitcoin/src where the file bitcoin-cli resides

Thanks for any suggestions or help.

I found debug.log.  thank you very much.  It is updating every second.  One of the latest entries:


i searched the Internet to find that the latest block mined at 8:30PM EST was Block 676921.

The height on my local bitcoin database is 579028 so I assume I am still catching up?

Thank you for your suggestions.
1. I have 4 TB of data space on an external Mac drive.

2. The bitcoin core is already downloaded to it.

3. at a terminal prompt if it type:       the response is: "Bitcoin Core is probably already running".  The Mac app Activity Monitor shows bitcoind running and i notice that the received packets is constantly increasing. 

4. NotATether:  What command do I run to see your code message below?
when i run      there is no option for "progress"

5. If i press CNTRL-C in my bitcoin/src directory where the bitcoind file is I get no response except a new terminal prompt

Thank you,

Sorry for the dumb questions but as a python and JavaScript programming I am learning from well acclaimed book: "Mastering Bitcoin".   I have downloaded the bitcoin core and ran the file: "bitcoind"  per the instructions in the book.  Now I have an app bitcoind, running nonstop.  Can anyone tell me what it is doing?

How do I stop it?

I want to thank everyone, especially "NotATether",  for your help.  I am now successfully downloading the Bitcoin Core. 

Thank you for your feedback on setting up an external Mac drive. I think I am ready to go.  When I double click on the Bitcoin Core App, I get the following Mac OS error:

   "Bitcoin Core.app" can't be opened because Apple cannot check it for malicious software.  This software needs to be updated. Contact the developer for more information. "

Has anyone run into this error and have a solution?

Thank you very much,

######

The second thing I did was:
1. create a "bitcoin" folder on my Mac external drive and downloaded the DMG to it.  
2. Followed the directions in doc/build-osx.md to make a P2P node.  It was long and fairly straight forward installing a lot of dependancies via Homebrew.  The last command is "make" in a terminal window.  If I run this command it says:
"The first time you run bitcoind, it will start downloading the blockchain. This process could take many hours".

I have to admit I am a little shy to type this command because of all the hype about burning bandwidth with my ISP (Mediacom) and my electricity usage (Delmarva Power).  Does any one have feedback for attempting to build the blockchain on a MacBook Pro with 16GB RAM or similar, and a 1TB drive?

Running Mac OS Big Sur version 11.1

Can someone please provide the best source for "Bitcoin Core" For a Mac with External Drive?

Thank you.