Hervé

It's not an issue, it's the natural and expected behaviour (and has been since Mavericks 10.9). A quick and basic Google search will lead you to the necessary settings (PrefPane) arrangements. I'm sure you can find the appropriate keywords...

Please use the forum spoiler feature for such dumps (rather than us doing it for you).

Got a type-C to type-A adapter and can confirm that the type-C USB port is working as expected on my non-TB 7490 with USB2/USB3 keys or USB external HDDs.

What's the dual screen arrangement ?

It was always clearly stated in the thread that support for V7 and V8 models was limited due to unfinished development. Feel free to experiment with other kexts if you wish and share your eventual findings if you were to come across a kext that worked better. NB: as stated in our posted rules, no need to quote messages you directly reply to.

No, I'm saying the E7250 does not use the same Alps model as that of the E6x30 (which is V3 Rushmore with ID: E7=0x73 0x03 0x0a, EC=0x88 0x08 0x1d). If you use Dr Hurt's R6 version, you can easily check your Alps touchpad model with the log show command detailed in DrHurt's dedicated kext thread. The kext only fully supports Alps TouchPads models V1 to V5.

Not the same TouchPad model but you certainly ought to use the same Voodoo PS2 controller kext.

The touchpads fitted to those Dell Latitude E Series are simply too small for most gestures beyond simple scroll or click/tap. At best they're about half to 2/3 the size of what you'd find on a real Mac and plainly unsuitable for those complex 2 or 3 finger gestures.

That would be because you create your image using the default settings that are inappropriate to your desired usage. Look a little closer at the available options when you create your image or call on macOS built-in help...

Happy to confirm. Works with the DW1820a in my Latitude 7490.

Again, unless you identify your hardware, no-one can assist. Please check our FAQ section re: wireless.

Install Display Menu app (free off the AppStore) and check if displays are in mirror mode. If they are, deselect Mirror Displays option in the app menu. Then, your Clover config needs serious revisiting. And you could start by enabling that 2nd HDMI patch you've got disabled at present...

Please post your debug files. Consult FAQ section if you need assistance on the matter.

1) it's a DW1820A 2) I don't know where you read it was Plug & Play, but you sure got that totally wrong 3) please consult our R&D->Wireless section on the matter but opting for a DW1820A before checking could prove a poor choice/decision...

On paper, this computer meets the minimum specs to run any recent macOS flavour. For the rest, you'll have to make up the list of hardware components, ideally with their PCI ids. I'm talking stuff such as LAN, audio, card reader, webcam, etc. This is mandatory to obtain adequate assistance. You may collect this information from Windows Device Manager (PCI ids are available in driver info tabs) or through dedicated apps that lookup the components of computers. Obviously, Lenovo web site would be the 1st place to look things up too but manufacturers don't always provide full details of the hardware components.

Use the recommended version available here, not beta version R6B6. The final version certainly worked perfectly when used in the (non-touch) E7250 I had a few months ago; it's included in the bootpacks I posted in my guides.

FAQ section -> debugging.

Please consult the FAQ section and search the forum (where this model has been discussed at length) or others. All those questions have existing answers and everyone is expected to do basic homework. Haswell platforms are supported in all OS X/macOS versions since ML 10.8.5. FAQ Guides for Dell E5xxx support OS X/macOS info etc. etc. NB: No double post please...

Post split to its own thread... You should find all you need here, especially on last page.

Obviously you replace the files you have in your Clover EFI folder by those provided in the proven bootpack.

It is.

There can be no comparison between CPU utilisation under windows and that under macOS. Both OS operate differently and latter is more power hungry than the former due to reliance on graphics. So yes, battery life is very often reduced under macOS in comparison to Windows.

I've no USB Type-C flash drive or no adapter to test a Type A USB key directly off the USB Type-C port.

Because, on any given laptop: dGPU is located @1 (IO address 0x00010000) iGPU is located @2 (IO address 0x00020000) in the same respect that HDEF audio device is always located @1b or XHC USB3 controller device is located @14. That's standard across the board.

Wifi support depends entirely on the card you have; support is not generic and, over the years, gradually reduced to some specific Broadcom chips. Transition from mini-PCIe to M.2 format reduced choice even further. Check our FAQ section and inventories on the matter.