Can't install the.dmg on Mac

[Snah1]

My Mac doesn't allow me to install the uploader for it can't verify the developer of this software and it can't verify that there is no malware.

Please solve this issue?

.

[darsenS]

Use the General pane of Security & Privacy preferences to protect your Mac from [malware] and tampering.

To change these preferences on your Mac, choose Apple menu > System Preferences, click Security & Privacy , then click General.

Note: If the lock at the bottom left of the pane is locked , click it to [unlock the preference pane]