Logging in with IVMS4200 from a mac suddenly not working

Hi All,

I am a small business owner.

I installed a DS-7608NI-E2 / 8P/A with 3 hikvision cameras about 6 weeks ago.

All cameras are POE, all domes. Everything works perfectly. I'm new to CCTV but have a decent grasp of electronics and networking.

I run the NVR at my workplace and have been logging in from a local mac and 2 different remote macs, All using IVMS4200 V1.02.04.1 client software.

Following installation of IVMS 4200 on three different macs, I booted the software first time and...

Logging in with IVMS4200 from a mac suddenly not working