Mac OS X Softwares to Support for OPML import of feeds

Feedbro is a powerful and versatile browser extension for Chrome and Firefox that transforms your web browser into a local feed reader. It allows you to easily follow updates from websites, blogs, and social media platforms through RSS, Atom, and RDF feeds, providing a centralized and ad-free experience for consuming news and content.

QuiteRSS is a free, open-source, cross-platform RSS/Atom news feed reader featuring an integrated web browser, filtering options, notifications, and support for multiple languages. It's designed for efficient news consumption and organization.

Thunderbird is a free, open-source email client developed by the Mozilla Foundation, offering robust features for managing multiple email accounts, integrated chat, and RSS feeds. Known for its extensibility and focus on user privacy and security.