Apple's recent macOS update includes enhancements focused on battery health and charging efficiency for the MacBook lineup. A notable feature is the Charge Limit option, which allows users to set charging levels between 80% and 100% to extend battery longevity. Additionally, macOS 26.4 introduces a "Slow Charger" indicator that alerts users when connected to a power adapter that does not provide adequate wattage. This warning appears in the battery status menu and settings, helping users identify slow charging issues caused by low-wattage adapters, non-certified cables, or USB-C hubs that restrict power delivery. If users see the "Slow Charger" warning, Apple recommends switching to a charger and cable that meet the minimum wattage specifications for their Mac model, which can be verified on Apple's official website.