The research aims to establish the predictors of the acceptance of technical and organizational measures for the protection of personal data to ensure information privacy in Croatian libraries, starting from the constructs of the APCO Macro Model. Two data collection methods were used: the online survey questionnaire method and the analysis of the websites of independent libraries in the Republic of Croatia. The results show that the acceptance of measures for personal data protection by a library manager is mostly influenced by perceived knowledge, while culture and trust have a positive correlation of moderate strength. Awareness has a low positive correlation, and privacy experience is not statistically related to the acceptance of measures. There is no statistically significant difference in the acceptance of measures for the protection of personal data concerning age and work experience in the profession. There is a statistically significant correlation between compliance with the principle of transparency and the size of the library.