Background Timely access to essential health technologies depends on aligning evidence-informed adoption with financing, procurement, delivery, monitoring, and learning. We examined how decision pathways shaped selected health technologies progression from prioritisation to implementation in South African public sector, and their implications for access, equity, sustainability, and learning. Methods We conducted a qualitative, retrospective, multi-case health policy analysis of twenty essential health technologies purposively selected to capture variation in technology type, disease area, delivery platform, adoption trajectory, and implementation outcome. Document review, process mapping, and key informant interviews were used to reconstruct decision pathways. Analysis was guided by the Policy Cycle Framework, Health Policy Triangle, and Health Technology Assessment (HTA) process domains. Results Decision pathways varied by technology and delivery platform but followed a common sequence from prioritisation and appraisal to policy endorsement, implementation, and limited reassessment. Medicines and vaccines were generally embedded within established national decision structures. Diagnostics required coordination across laboratory, programme, procurement, and service-delivery systems, while medical-device decisions were more decentralised. Upstream appraisal focused on safety, effectiveness, and public health needs; affordability, infrastructure, equity and sustainability were addressed inconsistently. System learning was evident when routine data, pharmacovigilance, programme review, and guideline revision informed post-adoption adaptation. Weak feedback loops limited reassessment of implementation barriers, equity effects, and sustainability, contributing to delays despite policy endorsement. Conclusion South Africa has formal structures for evidence-informed technology adoption. HTA would be strengthened by treating appraisal as part of lifecycle governance, with earlier alignment between adoption decisions, financing, procurement, implementation readiness, monitoring, and reassessment.