<ul><li>The user's Bitcoin Core app on their MacBook stopped synchronizing with the network.</li><li>They tried increasing the RAM allotment for the app, but upon reopening it, they received an error message about rebuilding the database.</li><li>The user is new to Bitcoin and is seeking help to get the app working again and recover their funds.</li><li>They did not write down their private key and are looking for guidance on extracting it from the database files.</li></ul>

Upon opening the app, Bitcoin Core says I need to rebuild the block database. It then says error loading block database and crashes

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