Authors List page : how to exclude posts from certain category

Ahh friend, you don’t need such a hard way! This should do…

<?php
    $curauth = get_userdata($row->ID);
    $user_link = get_author_posts_url($curauth->ID);
    $posts = get_posts(array(
                             'author' => $curauth->ID,
                             'cat' => 60, //for single category, 60
                             'cat' => -60, //for excluding this category
                             'posts_per_page' => -1,
                            )
                      );
    $post_count = count($posts);
?>

Remove the commented line as per your requirement. Try and let me know!