The first types were a proper dongle, with a USB female dangling at the end of a short cable. Still have a couple, but the newer, smaller types are now very commonly available for a couple of quid. They all do the job, especially just for thumb drives or keyboard dongles. Easy peasy lemon squeezy.

My thumb drives are probably three quarters dead if I'm being honest, most are just freebies, promos, etc that I've gathered over time. Haven't been bothered to sift through them. They are at least in a small tidy gift box. Finding one that still reliably works is often the challenge or finding the 'right' size of drive that can be read by ancient device exhibit X....😂

It is apparent the instant you connect. On Mac and PC.

Some people are lucky enough not to feel low levels of latency, sadly I’m not one of them.

I got a new Logitech MX the other month and I was hopeful that the combination of that that more up to date Bluetooth on Mac and Windows would mean I could feel the latency anymore. But no, I can still feel it.

I should give it another test with Sequoia, I think they were making some Bluetooth tweaks targeting latency.

I don’t have a problem with latency on keyboards, just mice.

Also Apple do something magic with the trackpad, I cannot detect any latency with the trackpad on Bluetooth (or it could be that you are making much smaller physical movements with the trackpad).

But with a mouse I can instantly feel it the first time I make a sweeping side-side movement. That is that treacly laggy feeling. Swap to the dongle and it is instantly gone.

It is possibly made worse by the way I have my mice configured. I have always preferred the Windows feel for mouse movement (a mouse on macOS with the standard settings feels broken to me). That may well make latency more apparent.

I use a logitech mouse an a mac wireless keyboad.

If you have an Apple Silicon Mac then HDMI connectors are absolute sods for creating interference with wifi and BT. Rendered my M2 Pro mini unusable until I sussed the issue. Was an excuse to get a new, USB-C, monitor anyway...

It is bigger deal for me with the Logitech dongle. When my MacBook had a USB-A port the dongle was permanently plugged in, because it is so low profile you can leave it there even when the MacBook is in a case (though I did always put it into my bag with the dongle facing the sky).

Now my MacBook has no USB-A ports I have to use an adapter, it sticks out four times further and you definitely can’t leave it in when travelling.

Which means I’ve gone from never forgetting to take my dongle with me to regularly finding I have my mouse, but the dongle and adapter are sat at home on my desk 😢

So I’m the user bemoaning the loss of USB-A ports. 😉

I wish Logitech would make a USB-C one, but from looking at the sizes of the components involved I fear they’ve avoided it because it would end up sticking out a lot further than the USB-A one.

I don’t use the HDMI port. The two 2.4 GHz only Amazon WiFi switches in office probably don’t help, but I can still feel the BT latency away from those.

Fair enough. How old is your MacBook? They haven't had USB-A ports for years.

I use an MX connected by Bluetooth to an Intel Mini. Absolutely no latency problems.

Current one is a M1 Max 16, previous one was/is a 2015 MacBook Pro 15 (the last one before the TouchBar and soldered in SSDs).

My Studio is connected using HDMI - no problems. Alternative Thunderbolt port to monitor is being used by OWC docking station. It all plays nice together and there's 10Gbit RJ and 25 Gbit MM fibre ethernet in and out of those Mac's, enough WiFi to crisp a peking duck probably too..

I'm genuinely quizzical about this delay issue on Bluetooth spoken about here, Never seen it myself. Nor this memory leaks. My desktop rarely gets powered down, and runs weeks at time between reboots