Hello,
You can temporarily disable cron jobs. (just for debugging )
And run processes manually via command line:
php /Users/pektsekye/www/magento2/update/cron.php
/Users/pektsekye/www/magento2/bin/magento setup:cron:run
Then again:
php /Users/pektsekye/www/magento2/update/cron.php
This way you will always see if process is still running or it is complete or there is some error.
PS: Don't forget to enable cron job. Magento will not work without it.
Stanislav