Instructions for Bitcoin Core 0.14.2 on Mac OS X Yosemite
Go to the Bitcoin Core download page and verify you have made a secure connection to the server.
Click the large blue Download Bitcoin Core button to download the Bitcoin Core installer to your Downloads folder.
Optional: Verify the release signatures
If you know how to use PGP, you should also click the Verify Release Signatures link on the download page to download a signed list of SHA256 file hashes. The 0.11 and later releases are signed by Wladimir J. van der Laan’s releases key with the fingerprint:
Earlier releases were signed by Wladimir J. van der Laan’s regular key. That key’s fingerprint is:
Even earlier releases were signed by Gavin Andresen’s key. His primary key’s fingerprint is:
You should verify these keys belong to their owners using the web of trust or other trustworthy means. Then use PGP to verify the signature on the release signatures file. Finally, use PGP or another utility to compute the SHA256 hash of the archive you downloaded and ensure the computed hash matches the hash listed in the verified release signatures file.
After downloading the file to your Downloads folder (/Users//Downloads), run it by double-clicking its icon. OS X will open a Finder window for you to drag Bitcoin Core to your Applications folder.