Can't connect to localhost after upgrading to El Capitan - apache

Question

After updating to El Capitan I can't access localhost.
Another computer where El Capitan was already at the installation of MAMP everything works fine.
Both Apache and MySQL server start ,but can't get to localhost page
This is what I've tried so far:
1) Uncommented some of the lines on httpd.conf as indicated on some messages
2) Replaced current files with files in private/etc/apache2/original
3) Copied http.conf and extra/ from the other computer (the one where localhost is working)
4) Tried different ports configuration (Apache: 8888 & MySql: 8889)
Since none of the above worked, I put back files to the original state (i.e. before uncommenting or replacing)
Finally, if instead of localhost I type computer_name.local/ on the browser address bar I can see my files.
I am VERY new with all this, any suggestions?
Thanks,
S
Denis, thanks for the suggestion. These are the results from Terminal:
lo0: flags=8049 mtu 16384
options=3
inet6 ::1 prefixlen 128
inet 127.0.0.1 netmask 0xff000000
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
nd6 options=1
gif0: flags=8010 mtu 1280
stf0: flags=0<> mtu 1280
en1: flags=8823 mtu 1500
ether 88:63:df:cb:a5:39
nd6 options=1
media: autoselect ()
status: inactive
en0: flags=8863 mtu 1500
options=10b
ether ac:87:a3:14:72:1b
nd6 options=1
media: autoselect (none)
status: inactive
en2: flags=963 mtu 1500
options=60
ether 0a:00:00:3c:bc:00
media: autoselect
status: inactive
en3: flags=963 mtu 1500
options=60
ether 0a:00:00:3c:bc:01
media: autoselect
status: inactive
en5: flags=8863 mtu 1500
options=10b
ether 40:6c:8f:38:4f:a5
inet6 fe80::426c:8fff:fe38:4fa5%en5 prefixlen 64 scopeid 0x8
inet 192.168.1.21 netmask 0xffffff00 broadcast 192.168.1.255
nd6 options=1
media: autoselect (1000baseT )
status: active
en7: flags=8863 mtu 1460
ether 02:50:f2:00:00:01
nd6 options=1
media: autoselect
status: inactive
p2p0: flags=8802 mtu 2304
ether 0a:63:df:cb:a5:39
media: autoselect
status: inactive
bridge0: flags=8863 mtu 1500
options=63
ether 8a:63:df:bc:63:00
Configuration:
id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
ipfilter disabled flags 0x2
member: en2 flags=3
ifmaxaddr 0 port 6 priority 0 path cost 0
member: en3 flags=3
ifmaxaddr 0 port 7 priority 0 path cost 0
nd6 options=1
media:
status: inactive
awdl0: flags=8902 mtu 1484
ether 52:4f:2b:35:96:9d
nd6 options=1
media: autoselect
status: inactive