Can't Unzip Backup File

Jobs run without any error but when I try to unzip the backup file, it freezes my programs. I’m using mac mountain lion and it freezes both archive utility and stuffit expander.

2012/12/18 23:24.14: [INFO]: BackWPup version 2.1.17; WordPress version 3.5; Copyright © 2012 Inpsyde GmbH Author: Daniel Hüsken
2012/12/18 23:24.15: [INFO]: BackWPup comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it under certain conditions.
2012/12/18 23:24.15: [INFO]: BackWPup job: 2. 2012; DB+FILE
2012/12/18 23:24.15: [INFO]: BackWPup job started manualy
2012/12/18 23:24.15: [INFO]: PHP ver.: 5.2.17; cgi; Linux
2012/12/18 23:24.15: [INFO]: MySQL ver.: 5.0.91-log
2012/12/18 23:24.15: [INFO]: curl ver.: 7.21.0; OpenSSL/0.9.8o
2012/12/18 23:24.15: [INFO]: Temp folder is: /hermes/waloraweb003/b132/pow.joylee06/htdocs/wp-content/plugins/backwpup/tmp/
2012/12/18 23:24.15: [INFO]: Backup file is: /hermes/waloraweb003/b132/pow.joylee06/htdocs/backups/2012-12-18_23-24-14.zip
2012/12/18 23:24.15: 1. try for database dump...
2012/12/18 23:24.15: Dump database table "wp_cbnetpo_ping_optimizer"
2012/12/18 23:24.15: Dump database table "wp_commentmeta"
2012/12/18 23:24.15: Dump database table "wp_comments"
2012/12/18 23:24.15: Dump database table "wp_dynamic_widgets"
2012/12/18 23:24.15: Dump database table "wp_links"
2012/12/18 23:24.15: Dump database table "wp_options"
2012/12/18 23:24.16: Dump database table "wp_postmeta"
2012/12/18 23:24.16: Dump database table "wp_posts"
2012/12/18 23:24.18: Dump database table "wp_term_relationships"
2012/12/18 23:24.18: Dump database table "wp_term_taxonomy"
2012/12/18 23:24.18: Dump database table "wp_terms"
2012/12/18 23:24.18: Dump database table "wp_usermeta"
2012/12/18 23:24.18: Dump database table "wp_users"
2012/12/18 23:24.18: Database dump done!
2012/12/18 23:24.18: Add database dump "wrd_n4ikdaoo6h.sql" with 3.86 MB to backup file list
2012/12/18 23:24.18: 1. try for make list of files to backup....
2012/12/18 23:24.23: 2532 files with 46.93 MB to backup
2012/12/18 23:24.23: 1. try to create backup zip (PclZip) archive...
2012/12/18 23:25.32: Backup zip archive create done
2012/12/18 23:25.32: Archive size is 21.02 MB
2012/12/18 23:25.32: Job done in 78 sec.

http://wordpress.org/extend/plugins/backwpup/