first use-server error

i have installed on imac and run software but all i get is a window saying.. "Cannot connect to server, it dosent seem to be running".
The instructions say check this address http://localhost:23423/console. that came up with "This site can’t be reachedlocalhost refused to connect."
I also turned off my firewall but that made no difference.
Bit of a shame that its fallen at the first hurdle and there is no other means of help?
Anyone got a suggestion that isn't overly technical please?
Many thanks.
The instructions say check this address http://localhost:23423/console. that came up with "This site can’t be reachedlocalhost refused to connect."
I also turned off my firewall but that made no difference.
Bit of a shame that its fallen at the first hurdle and there is no other means of help?
Anyone got a suggestion that isn't overly technical please?
Many thanks.