If I understand correctly at the office you're sharing Internet connection over Wi-Fi, while at home you just want a plain Internet access over Wi-Fi, am I right?

Try creating another Wi-Fi interface for home access in System Preferences > Network > + button at the bottom of the list of network interfaces. Then use Wi-Fi 1 for Internet Sharring at your office and Wi-Fi 2 for Internet access at home.

Another thing that may be happenning here is subnets conflict, if it really occurs, try running the following command to change default ICS subnet (replace 192.168.x.0 in the address to some unused subnet range):

sudo defaults write
/Library/Preferences/SystemConfiguration/com.apple.nat
NAT -dict-add SharingNetworkNumberStart 192.168.x.0

If I understand correctly, at the office you're sharing an Internet connection over Wi-Fi, while at home you just want plain Internet access over Wi-Fi, am I right?

Try creating another Wi-Fi interface for home access in System Preferences > Network > + button at the bottom of the list of network interfaces. Then use Wi-Fi 1 for Internet Sharing at your office and Wi-Fi 2 for Internet access at home.

Another thing that may be happening here is subnet conflict. If it really occurs, try running the following command to change the default ICS subnet (replace 192.168.x.0 in the address with some unused subnet range):

sudo defaults write
/Library/Preferences/SystemConfiguration/com.apple.nat
NAT -dict-add SharingNetworkNumberStart 192.168.x.0

If I understand correctly at the office you're sharing Internet connection over Wi-Fi, while at home you just want a plain Internet access over Wi-Fi, am I right?

Try creating another Wi-Fi interface for home access in System Preferences > Network > + button at the bottom of the list of network interfaces. Then use Wi-Fi 1 for Internet Sharring at your office and Wi-Fi 2 for Internet access at home.

Another thing that may be happenning here is subnets conflict, if it really occurs, try running the following command:

sudo defaults write
/Library/Preferences/SystemConfiguration/com.apple.nat
NAT -dict-add SharingNetworkNumberStart 192.168.x.0

If I understand correctly at the office you're sharing Internet connection over Wi-Fi, while at home you just want a plain Internet access over Wi-Fi, am I right?

Try creating another Wi-Fi interface for home access in System Preferences > Network > + button at the bottom of the list of network interfaces. Then use Wi-Fi 1 for Internet Sharring at your office and Wi-Fi 2 for Internet access at home.

Another thing that may be happenning here is subnets conflict, if it really occurs, try running the following command to change default ICS subnet (replace 192.168.x.0 in the address to some unused subnet range):

sudo defaults write
/Library/Preferences/SystemConfiguration/com.apple.nat
NAT -dict-add SharingNetworkNumberStart 192.168.x.0