I followed the manual instructions on how to download domain mapping plugin and I get the following errors (see ERRORS below). Here are the steps I took when downloading...
Clicked download button
Created a mu-plugins folder under wp-content
Moved only the domain_mapping.php file from plugins to mu-plugins
Moved sunrise.php to wp-content
Added define( 'SUNRISE', 'on' ); to wp-config (placed it right before "replace_last"
Tried to login and couldn't so added the repair code to my config file and these are the errors...
wp_1_posts: Table 'besmartm_wrd1.wp_1_posts' doesn't exist
wp_1_comments: Table 'besmartm_wrd1.wp_1_comments' doesn't exist
wp_1_links: Table 'besmartm_wrd1.wp_1_links' doesn't exist
wp_1_options: Table 'besmartm_wrd1.wp_1_options' doesn't exist
wp_1_postmeta: Table 'besmartm_wrd1.wp_1_postmeta' doesn't exist
wp_1_terms: Table 'besmartm_wrd1.wp_1_terms' doesn't exist
wp_1_term_taxonomy: Table 'besmartm_wrd1.wp_1_term_taxonomy' doesn't exist
wp_1_term_relationships: Table 'besmartm_wrd1.wp_1_term_relationships' doesn't exist
wp_1_commentmeta: Table 'besmartm_wrd1.wp_1_commentmeta' doesn't exist