It looks like you are not there. When you are available, please try the following:
1. Disconnect the power cord(s) from your internet/wireless modem/router device(s) for about 5 minutes, then reconnect.
2. Turn off printer, then disconnect power cord from printer for a couple of minutes, then re-connect, then turn on.
3. Wait a bit, then see if you can print from the Mac computer or Win 7 computer.
4. If it does not print, then please do the following on the printer device: Press the Menu button, then use Up/Down buttons to select option Network, then press OK button
, then select option WLAN, then option Setup Wizard
, then select / connect to your wi-fi/wireless network name
; if it connects to your wireless network name successfully, then you should be able to print from the Mac computer and the Win 7 computer again.
; then see if you can print from the Win 10 computer; if needed, in Devices and Printers in Control Panel in Win 10 computer, remove the Brother item there, then click on Add a printer and see if it detects your wireless Brother printer, then add it, then check printing.
When you are available, please reply at the box below to continue troubleshooting. Thank you.