Licence
Elastic License 2.0, source available. It costs 10 euro, and nothing is locked, limited or switched off if you do not pay. Two things you may not do, and both are about that arrangement.
What you may do
- Use it on as many Macs as you like, at home or at work, without paying anything.
- Read the source, change it, build your own copy.
- Pass it on, as long as these terms travel with it.
What you may not do
- Offer it to other people as a hosted or managed service that gives them a substantial part of what this app does.
- Move, change, disable or work around the licence key handling, or strip out the reminder a key silences. That limitation is the reason this licence was chosen rather than a more familiar one: it names the one thing that would break the arrangement.
- Remove or obscure the licence and copyright notices.
There is no warranty. If it breaks a machine, that is on you, which is worth reading twice for software that reconfigures displays through an interface Apple does not document.
Source available, not open source
Worth stating rather than blurring. The Open Source Definition does not permit restrictions of this kind, so calling this open source would be wrong, however good it sounds. The source is there to be read, checked and built. It is not a grant to repackage the app with the request taken out.
What it costs, and how to get a key
Whatever it is worth to you. 10 euro is the suggested amount, and it is a suggestion rather than a price: nothing checks whether anything arrived, and nothing can. Naming a number is there to save you the question "how much is reasonable", which is the question that most often ends in nothing being sent at all.
- Nothing at all for the first thirty days. Somebody deciding whether this is useful should not be interrupted while deciding.
- After that, once every thirty days, it asks whether it has been worth anything. Not per launch, not per week. A reminder that appears constantly is not a reminder, it is a reason to stop using the software.
- A key stops the asking, permanently. That is the only thing a key does. No feature is behind one, nothing expires, no limit is lifted.
- Nothing is checked over the network. The key is verified on your own Mac against a number inside the app. No account, no activation, no server, and no way for anyone here to know whether you entered one.
The Support tab in Settings carries the addresses a contribution can go to, each with a button that copies it. Send the transaction reference to support@moredisplays.com and a key comes back. Type it into the same tab and the app stops asking.
A key looks like MD-XXXXX-XXXXX-XXXXX-XXXXX. The alphabet leaves out I, L,
O and U so nothing in one can be misread as a digit down a telephone, and the check
folds those characters back in if you type them anyway. Spaces, dashes and lower case
are all forgiven.
Third party code
The app has no third party runtime dependencies at all. The one that was permitted, an update framework, turned out not to be needed: the updater is a few hundred lines that ask this site what it is offering, check the download against the published checksum, and then make macOS confirm the signature and the notarisation before anything goes near your Applications folder.
Nothing is copied into this project, so this licence covers the whole of it. Every
reference that was read is recorded in ACKNOWLEDGEMENTS.md in the source tree.
This website uses Geist and Geist Mono, both under the SIL Open Font Licence 1.1, and Phosphor Icons under the MIT licence.
The Elastic License 2.0
Reproduced in full, verbatim from the licensor. The canonical copy is the LICENSE file in the source tree. If this page and that file ever disagree, the file is the licence.
Elastic License 2.0 (ELv2)
Copyright (c) 2026 Spectrumlabs B.V.
## Acceptance
By using the software, you agree to all of the terms and conditions below.
## Copyright License
The licensor grants you a non-exclusive, royalty-free, worldwide,
non-sublicensable, non-transferable license to use, copy, distribute, make
available, and prepare derivative works of the software, in each case subject
to the limitations and conditions below.
## Limitations
You may not provide the software to third parties as a hosted or managed
service, where the service provides users with access to any substantial set
of the features or functionality of the software.
You may not move, change, disable, or circumvent the license key functionality
in the software, and you may not remove or obscure any functionality in the
software that is protected by the license key.
You may not alter, remove, or obscure any licensing, copyright, or other
notices of the licensor in the software. Any use of the licensor's trademarks
is subject to applicable law.
## Patents
The licensor grants you a license, under any patent claims the licensor can
license, or becomes able to license, to make, have made, use, sell, offer for
sale, import and have imported the software, in each case subject to the
limitations and conditions in this license. This license does not cover any
patent claims that you cause to be infringed by modifications or additions to
the software. If you or your company make any written claim that the software
infringes or contributes to infringement of any patent, your patent license
for the software granted under these terms ends immediately. If your company
makes such a claim, your patent license ends immediately for work on behalf of
your company.
## Notices
You must ensure that anyone who gets a copy of any part of the software from
you also gets a copy of these terms.
If you modify the software, you must include in any modified copies of the
software prominent notices stating that you have modified the software.
## No Other Rights
These terms do not imply any licenses other than those expressly granted in
these terms.
## Termination
If you use the software in violation of these terms, such use is not licensed,
and your licenses will automatically terminate. If the licensor provides you
with a notice of your violation, and you cease all violation of this license
no later than 30 days after you receive that notice, your licenses will be
reinstated retroactively. However, if you violate these terms after such
reinstatement, any additional violation of these terms will cause your
licenses to terminate automatically and permanently.
## No Liability
As far as the law allows, the software comes as is, without any warranty or
condition, and the licensor will not be liable to you for any damages arising
out of these terms or the use or nature of the software, under any kind of
legal claim.
## Definitions
The **licensor** is the entity offering these terms, and the **software** is
the software the licensor makes available under these terms, including any
portion of it.
**you** refers to the individual or entity agreeing to these terms.
**your company** is any legal entity, sole proprietorship, or other kind of
organization that you work for, plus all organizations that have control over,
are under the control of, or are under common control with that organization.
**control** means ownership of substantially all the assets of an entity, or
the power to direct its management and policies by vote, contract, or
otherwise. Control can be direct or indirect.
**your licenses** are all the licenses granted to you for the software under
these terms.
**use** means anything you do with the software requiring one of your
licenses.
**trademark** means trademarks, service marks, and similar rights.