<p>The Al-Zn-Mg-Cu high entropy alloy system (HEA) has attracted a lot of interest lately because of its exceptional strength, resistance to corrosion, and thermal stability. The purpose of this study is to consolidate and evaluate the body of research on the synthesis procedures and properties of Al-Zn-Mg-Cu HEAs. The study explores several synthesis methods, including arc melting, casting, vacuum induction melting (VIM), mechanical alloying (MA), spark plasma sintering (SPS), and additive manufacturing (AM), emphasizing the impact of processing factors on phase formation and microstructural evolution. A thorough analysis of the mechanical, thermal, and corrosion characteristics of these alloys is provided, emphasizing the ways in which various alloying constituents and production parameters affect the performance of an alloy. The paper also offers insights into the design and optimization of Al-Zn-Mg-Cu HEAs by discussing the theoretical models and computational methods used to predict their behavior. Through the integration of results from various studies, this review highlights existing challenges and research gaps, proposing potential directions for further investigation. The objective is to facilitate the development and application of Al-Zn-Mg-Cu HEAs in advanced engineering fields by offering a comprehensive understanding of them.</p>