The internet pioneer said the sale of its main operating unit was on track to be completed in the second quarter, and that Mr McInerney would head the financial holding company that remains, provisionally called "Altbaba".
The main holding of Altbaba would be its stake in Chinese internet giant Alibaba, which is worth far more than the rest of the Yahoo operations.
Mr McInerney, 52, has been a Yahoo board member since April 2012 and previously served as chief financial officer of IAC/InterActiveCorp.
"Today's filing represents an important step forward in the process of completing our transaction with Verizon," Yahoo said in a statement.
"We will continue to move ahead expeditiously toward the closing, which we expect to occur in the second quarter of 2017."
The statement noted that Yahoo chief executive Marissa Mayer and chief financial officer Kenneth Goldman will remain in their posts prior to the closing.
Yahoo and Verizon last month cut the price of the sale to $4.48 billion - a reduction of $350 million - following revelations of massive data breaches that could further erode the image of the onetime internet leader.
Yahoo still faces probes and lawsuits related to the cyber-attacks, which affected more than 1.5 billion accounts, and the timing of the disclosures.
Yahoo announced in September that hackers in 2014 stole personal data from more than 500 million of its user accounts. And in December it admitted to another cyber-attack from 2013 affecting more than a billion users.