1974–1987: Addition of Buckingham and Nicks, and global success
In Bob Welch's words, following the Heroes are Hard to Find tour, "the buzz that the Mystery to Me band had started to create...[was] gone. I [was] totally exhausted by writing, singing, touring, negotiating, moving, and frankly so [were] Mick, John and Chris. We were all discouraged that Heroes [hadn't] done better. Something needs to change, but what? ... There was also a kind of fatigue, anger and bitterness that all the work we had done hadn't really paid off and we were just all sort of shaking our heads saying 'what do we do now' ... Everybody knew that we had to find some new creative juice." Welch himself had grown tired of the constant struggles to keep Fleetwood Mac functioning and was openly considering leaving the band.
Whilst Fleetwood was checking out Sound City Studios in Los Angeles during the autumn of 1974, the house engineer, Keith Olsen, played him a track he had recorded, "Frozen Love", from the album Buckingham Nicks (1973). Fleetwood liked it and was introduced to the guitarist from the band, Lindsey Buckingham, who was at Sound City that day recording demos. Fleetwood asked him to join Fleetwood Mac, and Buckingham agreed, on the condition that his music partner and girlfriend, Stevie Nicks, be included. Welch considered remaining as part of this extended lineup but opted to depart for a solo career. Buckingham and Nicks joined the band on New Year's Eve 1974.
In 1975, the new line-up released their first album together, the self-titled Fleetwood Mac, the band's tenth studio album overall. The album was a breakthrough for the band and became a huge hit, reaching No. 1 in the US and selling over 7 million copies. Among the hit singles from this album were Christine McVie's "Over My Head" and "Say You Love Me" and Stevie Nicks' "Rhiannon", as well as the much-played album track "Landslide", a live rendition of which became a hit twenty years later on The Dance album.
In 1976, the band was suffering from severe stress. With success came the end of John and Christine McVie's marriage, as well as Buckingham and Nicks's long-term romantic relationship. Fleetwood, meanwhile, was in the midst of divorce proceedings from his wife, Jenny, and had also begun an affair with Nicks. The pressure on Fleetwood Mac to release a successful follow-up album, combined with their new-found wealth, led to creative and personal tensions which were allegedly fuelled by high consumption of drugs and alcohol.
The band's eleventh studio album, Rumours (the band's first release on the main Warner label after Reprise was retired and all of its acts were reassigned to the parent label), was released in February 1977. In this album, the band members laid bare the emotional turmoil they were experiencing at the time. Rumours was critically acclaimed and won the Grammy Award for Album of the Year in 1977. The album generated four top-ten singles: Buckingham's "Go Your Own Way", Nicks' US No. 1 "Dreams", and Christine McVie's "Don't Stop" and "You Make Loving Fun". Buckingham's "Second Hand News", Nicks' "Gold Dust Woman", and "The Chain" (the only song written by all five band members) also received significant radio airplay. By 2003, Rumours had sold over 19 million copies in the US alone (certified as a diamond album by the RIAA) and a total of 40 million copies worldwide, bringing it to eighth on the list of best-selling albums. Fleetwood Mac supported the album with a lucrative tour.
On 10 October 1979, Fleetwood Mac were honoured for their contributions to the music industry with a star on the Hollywood Walk of Fame at 6608 Hollywood Boulevard.
Buckingham convinced Fleetwood to let his work on their next album be more experimental and to be allowed to work on tracks at home before bringing them to the rest of the band in the studio. The result of this, the band's twelfth studio album Tusk, was a 20-track double album released in 1979. It produced three hit singles: Buckingham's "Tusk" (US No. 8), which featured the USC Trojan Marching Band; Christine McVie's "Think About Me" (US No. 20); and Nicks' six-and-a-half minute opus "Sara" (US No. 7), cut to four-and-a-half minutes for the single. Original guitarist Peter Green also took part in the sessions of Tusk, although his playing on the Christine McVie track "Brown Eyes", is not credited on the album. In an interview in 2019, Fleetwood described Tusk as his "personal favourite" and said, "Kudos to Lindsey ... for us not doing a replica of Rumours."
Tusk sold four million copies worldwide. Fleetwood blamed the album's relative lack of commercial success on the RKO radio chain having played the album in its entirety prior to release, thereby allowing mass home taping.
The band embarked on an 11-month tour to support and promote Tusk. They travelled around the world, including the US, Australia, New Zealand, Japan, France, Belgium, Germany, the Netherlands, and the United Kingdom. In Germany, they shared the bill with reggae musician Bob Marley. On this world tour, the band recorded music for their first live album, which was released at the end of 1980.
The band's thirteenth studio album, Mirage, was released in 1982. Following 1981 solo albums by Nicks (Bella Donna), Fleetwood (The Visitor), and Buckingham (Law and Order), there was a return to a more conventional approach. Buckingham had been chided by critics, fellow band members, and music business managers for the lesser commercial success of Tusk. Recorded at Château d'Hérouville in France and produced by Richard Dashut, Mirage was an attempt to recapture the huge success of Rumours. Its hits included Christine McVie's "Hold Me" and "Love in Store" (co-written by Robbie Patton and Jim Recor, respectively), Nicks' "Gypsy", and Buckingham's "Oh Diane", which made the Top 10 in the UK. A minor hit was also scored by Buckingham's "Can't Go Back".
In contrast to the Tusk Tour, the band embarked on only a short tour of 18 American cities, with the Los Angeles show being recorded and released on video. They also headlined the first US Festival, on 5 September 1982, for which the band was paid $500,000 (equivalent to $1,668,000 in 2024). Mirage was certified double platinum in the US.
Following Mirage the band went on hiatus, which allowed members to pursue solo careers. Nicks released two more solo albums (1983's The Wild Heart and 1985's Rock a Little). Buckingham issued Go Insane in 1984, the same year that Christine McVie made an eponymous album (yielding the Top 10 hit "Got a Hold on Me" and the Top 40 hit "Love Will Show Us How"). All three became successful in their solo efforts, with Nicks being the most popular. During this period, Fleetwood had filed for bankruptcy, Nicks was admitted to the Betty Ford Clinic for addiction problems, and John McVie had suffered an addiction-related seizure—all of which were attributed to the lifestyle of excess afforded to them by their worldwide success. It was rumoured that Fleetwood Mac had disbanded, but Buckingham commented that he was unhappy at allowing Mirage to remain the band's last effort.
The lineup featuring Fleetwood, the McVies, Buckingham, and Nicks recorded one more album, their fourteenth studio album, Tango in the Night, in 1987. The recording started off as a Buckingham solo album before becoming a full group project. The album went on to become their best-selling release since Rumours, especially in the UK where it hit No. 1 three times in the following year. The album sold three million copies in the US and contained four hits: Christine McVie's "Little Lies" and "Everywhere" ("Little Lies" being co-written with her new husband, Eddy Quintela), Sandy Stewart and Nicks' "Seven Wonders", and Buckingham's "Big Love". "Family Man" (Buckingham and Richard Dashut) and "Isn't It Midnight" (Christine McVie) were also released as singles.