You can't download $BNB for mining because Binance Coin (BNB) is not mineable. BNB is a cryptocurrency that fuels the Binance ecosystem, and its supply is managed by Binance. If you're interested in acquiring BNB, you can:

Buy BNB: Purchase Binance Coin on various cryptocurrency exchanges, such as (link unavailable)

Participate in Binance Launchpad: Join token sales on Binance Launchpad, which may offer BNB as a payment option.

Use Binance Services: Utilize Binance's services, like trading or staking, which can help you earn or acquire BNB.

If you're looking to mine cryptocurrencies, consider exploring other mineable coins or tokens. Some popular mineable cryptocurrencies include:

Bitcoin (BTC)

Ethereum Classic (ETC)

Monero (XMR)

Dogecoin (DOGE)

Keep in mind that cryptocurrency mining requires significant computational power and energy resources. Always research and understand the requirements and potential profitability before investing in mining equipment or activities