If you bought a "no-name" system from Amazon or eBay:
If Mac CMS is hopeless, use the mobile app (often more reliable): cms for mac dvr new
Most generic or Chinese-brand DVRs (H.264/H.265) use one of a few common CMS platforms. Look for a sticker on the DVR or check the manual. Common brands include: If you bought a "no-name" system from Amazon or eBay:
Why this matters: CMS software is brand-specific or chipset-specific (HiSilicon, Ambarella, etc.). If Mac CMS is hopeless, use the mobile