The Upgrade Wizard hangs without error at the system check when upgrading or installing a patch to SugarCRM 5.0. Refreshing the browser window does not resolve the problem.
The session.save_path setting in the php.ini file is set to a folder which either does not exist or to which the apache user does not have sufficient rights.
To resolve this issue:
1) Create a “sessions” folder under the /htdocs directory; this folder may be named as you please.
2) Change the php.ini session.save_path setting to include the sessions folder created above.