Usually as an opposition party, PSM was part of the Government of the Island Council of Majorca from 1995 until 2003 and from 2007 until 2011, and of the Government of the Balearic Islands from 1999 until 2003 and from 2007 until 2011.[2]
In 2007, this coalition was enlarged, forming the new coalition Bloc for Majorca (Bloc). The coalition got 4 MPs (14%) in the Balearic Parliament (2 of them from the PSM). After negotiations, PSM and the other Bloc's parties decided to enter the autonomous government, with Socialist Party of the Balearic Islands (PSIB) and Majorcan Union (UM), leaving the People's Party (PP) in the opposition.[2]
In 2008, the party decided to change its allies for the general election to UM, ERC and ExM. The coalition refused to join with EUIB. However, 29% of the members wanted to follow the former alliance with EUIB and EV. Most of them were members of the PSM–Left Nationalist Youth. With less than 30,000 votes, no representation in the Cortes Generales was obtained. Also in 2008, the PSM became a full member of the European Free Alliance (EFA).
In 2011, the Bloc broke and the party decided to form an electoral coalition with IniciativaVerds (IV) and ExM for the regional election. The coalition got 36,149 votes and 4 seats in the Parliament. Later that year, the coalition was enlarged by the addition of the new ecologist party eQuo, and participated in the 2011 general election, getting 31,378 votes and no representation.
In March 2016, Bel Busquets was elected Secretary General, in substitution of Biel Barceló.[3] In December 2018, the party was "frozen" and its political activities were transferred to Més per Mallorca (Més).[4]