Steve Jobs' widow and her boyfriend holiday in Croatia on $100m yacht he designed but never got to use

The widow of Steve Jobs and her boyfriend have been pictured on holiday in Croatia with the $100 million yacht the late Apple founder built but never got to use.

Laurene Powell Jobs was seen enjoying a day of sightseeing in Dubrovnik with Adrian Fenty, the ex-mayor of Washington D.C, and with her 19-year-old daughter Eve, who had an iPhone tucked into her waistband.

The 53-year-old's 256ft-long luxury yacht Venus was moored off the coast as they spent time in the historic city.

Steve Jobs commissioned the ship in 2008, a few years after his first cancer diagnosis, but he never got to walk on board, since the tech genius died a year before it was completed in 2012.

He enlisted the expertise of designer Phillippe Starck to create his one-of-a-kind sailing paradise and hired the chief designer of the Apple Stores to make structural glass for the yacht.

It has been reported that a row of 27-inch iMacs are used by the ship's captain to navigate in the wheelhouse.

Jobs' widow Laurene Powell Jobs is believed to maintain ownership of the ship.

Powell was left widowed after Apple founder Steve Jobs passed away, aged 56, from complications from pancreatic cancer in October 2011. They had three children together and Powell is also step-mother to Jobs' daughter, Lisa Brennan-Jobs.

Venus (pictured off the coast of Dubrovnik) was completed in 2012, about a year after Jobs died of pancreatic cancer

Fenty, mayor of Washington D.C. between 2007 and 2011, formally announced his separation from his wife of 15 years, Michelle, in January 2013. They also have three children together.

Sources told the Washington Post that summer that Fenty and Powell started seeing each other around the same time, but there is no suggestion that Powell had anything to do with the separation.

It is believed the two met at a Houston education conference in 2011 and bonded over school reform; Powell is the founder of Emerson Collective, which advocates for education reform.

The following year, Fenty joined the board of College Track, a non-profit program for underserved students wanting to go to college that was co-founded by Powell.

Powell had married Jobs two years after meeting him when he gave a talk to Stanford Business School while she was a student there.

Their wedding took place in March 1991 at a hotel in Yosemite Valley, and the ceremony was led by a Zen Buddhist monk, Kobun Chino Otogawa, in keeping with Jobs' religious beliefs.

Their eldest child, a son named Reed, was born six months later, and the couple had two daughters, Erin and Eve, in the years following.

While she was on the boards of several companies and charities during his lifetime, it was only after he died that she began to speak publicly to draw attention to the causes that mattered to her.

They were married for 20 years and after his death, she inherited an estate of about $10 billion.

Despite being one of the richest women in the U.S. she has kept a low profile as she continues with her charitable work.

Since Fenty left the mayor's office, he has focused on acting as a consultant to education tech companies and working as a special adviser at Andreessen Horowitz.

When Steve Jobs passed away in October 2011, most of his assets passed on to his wife, making her one of the 50 richest people in the world.

She owns, among other things, two private jets, four real estate properties and shares of the Walt Disney Company and Apple, Business Insider reported last year.

The report said Powell Jobs was now the sixth richest woman in the world based on Forbes' ranking, behind French L'Oreal shareholder Liliane Bettencourt, Wal-Mart heiress Alice Walton, Mars heiress Jacqueline Mars, Italian Michele Ferrero's widow Maria Franca Fissolo and German BMW heiress Susanne Klatten.