How to Play Gakumas (Gakuen Idol Master) on Mac: Sideloady Guide

Introduction

Gakumas（Gakuen Idol Master） is originally an app for iOS / Android, but there is a way to run it on a Mac.
Here, I will summarize the steps to install the IPA file on a Mac using Sideloady and actually run it, as well as the problems encountered and their solutions.

Japanese refs:

• https://note.com/hoy0verse/n/n043bb3308a0d#5e54f119-c5eb-45a0-bc8f-00c03c283214
• https://misskey.io/notes/a5pvn728kcix0312

Steps

1. Install Sideloady

First, download and install Sideloady.

2. Download Gakumas IPA file

3. Sideload

4. Launch!

A problem occurred here. The login screen is normal, but when the download starts, the screen turns black. (This happens probably because it switches to landscape display)

Solution

Inject this into the IPA.

<key>UISupportedInterfaceOrientations</key>
<array>
  <string>UIInterfaceOrientationPortrait</string>
  <string>UIInterfaceOrientationPortraitUpsideDown</string>
  <string>UIInterfaceOrientationLandscapeLeft</string>
  <string>UIInterfaceOrientationLandscapeRight</string>
</array>

Sideload again.

If the screen turns black again, switching View -> Landscape/Portrait from the top left menu should fix it.

Issues

• Display resolution remains at iPad specifications
• UI is slightly unnatural as it is not optimized for Mac