Sun Microsystems co-founder Scott McNealy first put his Silicon Valley monster mansion on the market for $96.8 million in June 2018.

The tech big shot lopped $42 million off the price in October after the Portola Valley home on 13 serene acres didn't sell.

Now, the home is listed for $53.888 million, and the interior has an entirely new look and feel with revamped staging. The McNealy family's darker and heavier furnishings have been pulled out, replaced by lighter, fresher pieces. Also, new photos were taken of the property and in the gallery of before-and-after images above you can see the transformation.

Listing agent Deepee Chattha of Rex Homes said McNealy is now serious about selling the property as his children have all grown and moved out.

"They were not serious when they had put it on the market earlier," said Chattha. "It was an exclusive listing. They were testing the market. The children were at home. Now, the kids are leaving. They’re ready to make the move. It’s too big a house for them now. Now, they’ve listed on the MLS."

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Scott and his wife, Susan, built the modern adobe estate at 610 Los Trancos Rd. in 2008, spending more than $11 million, as reported by SFGATE in October. The 20-room home includes five bedrooms, 7.5 bathrooms and a separate 4,000-square-foot guest house. The interiors are grand and spacious with large windows taking in views of the surrounding wooded hills. Hardwood floors, wood-paneled ceilings and stonework fireplaces add warmth.

The property features a long list of amenities unlike any other real estate offering in the area. For entertaining, there's a home theater, poker and billiards rooms, a room dedicated to making pizzas with a wood-fire oven, and a party room with a disco ball and dance floor. The offerings for athletic activities are even more impressive and include a 110-yard golf practice area with two putting greens, a 4,700-square-foot gym with a rock-climbing wall and locker room, a tennis pavilion, a swimming pool with a spa, and a 7,300-square-foot ice hockey rink.

"A lot of heart went into building this home. It was built from love," said Chattha. "Family is very important to the McNealys. Life for them has been about their boys. They built everything for them. They had lots of sleepovers. Friends and family would come together. This was the hub for everyone. They have this grand family room and living space where everyone is always hanging out. You see it when you walk in. They cook, they hang out. You can feel that in the space. It’s a family house."

Tucked away in the tiny and bucolic unincorporated town of Portola Valley, the property feels worlds away from the buzz of the Silicon Valley, but it's only 4 miles from Stanford University, 11 miles from the Google campus and 12 miles from Facebook headquarters.

"To get that kind of privacy in Portola Valley, it’s hard to find," said Chattha.

As of 2018, McNealy had an estimated net worth of $1 billion. He was the CEO of Sun Microsystems for 22 years before stepping down in 2006. Oracle purchased Sun in 2009 for $7.4 billion.

Along with PayPal founder Peter Thiel, McNealy is one of the few Silicon Valley executives who has publicly voiced support of President Donald Trump and hosted a 2020 campaign fundraiser at his home in September, according to The Chronicle.

The property is listed with REX, a real estate startup in which McNealy has invested, according to the Wall Street Journal.

Amy Graff is a digital editor with SFGATE. Email her: agraff@sfgate.com.