Hello Jack and Mike,
I have some information to share with both of you. Unfortunately because each of your laptop models are different, the solutions I have do not apply to both of your systems equally.
Unfortunately when using our DisplayLink technology products, the ‘Screen Recording’ feature is required. This is the way that the UD-6950H can see the virtual displays being rendered by the DisplayLink Manager App. Please note that since we do not write this program, and this required was set in place by Apple we are unfortunately unable to assist with this.
With that said I can provide some possible solutions for each of you below.
Mike (2019 Intel based MacBook Pro) → Since you are using an Intel based Mac I could recommend to you one of our ‘Alt Mode’ docking stations instead. These docking stations do not use DisplayLink technology and can bypass this problem completely. An example would be our TBT3-UDC3 → https://plugable.com/products/tbt3-udc3 (As a bonus this docking station can also provide power delivery to your Mac.) You may also be interested in trying the solution that I have provided to Jack, as our mixed feature docking stations can be a bit cheaper.
Jack (2020 M1 based MacBook Air) → Unfortunately since you are using a 2020 M1 MacBook Air, the solutions we have available are limited. The original M1 series MacBook’s unfortunately are only capable of supporting 1 ‘Alt Mode’ display as a hardware limitation.
A possible solution would be to use one of our UD-ULTCDL, or UD-ULTC4K docking stations. These docking stations provide 2 DisplayLink displays (Uses screen recording), and one ‘Alt Mode’ display (that I believe could be used to show you Citrix display, however I am unable to personally test this theory). You can check out our UD-ULTC4K(Up to 4K@60hz) and UD-ULTCDL(up to 1080@60hz) here → https://plugable.com/products/ud-ultc4k // https://plugable.com/products/ud-ultcdl → Both of these docking stations can also provide power delivery over USB-C.
I hope some of this is helpful, I will keep a lookout for any follow-up questions.