The study examined the adoption of Mobile Online Public Access Catalogue (M-OPAC) platforms for enhancing access to information resources in public university libraries in Katsina State, Nigeria. Four (4) objectives were raised to guide the study. A descriptive survey design was adopted for the study. The population comprised 7,060 registered library users from three public universities in Katsina State. A sample of 379 respondents was determined using Yamane’s (1967) formula. A structured questionnaire was used to collect data from respondents. Data were analyzed using descriptive statistics such as frequency counts, percentages, and mean scores. The findings revealed that awareness of mobile OPAC platforms among users was moderate, but actual adoption and usage were low. The major challenges identified include poor internet connectivity, inadequate technical support, limited training on mobile OPAC use, and low ICT literacy among some users. The study recommends the provision of robust ICT infrastructure, regular user training on mobile OPAC functionalities, and increased library sensitization programs to promote effective use of the platforms.