Disable Mac Catalyst 77% app scaling

UINSSceneView+CTX.h

//
//  UINSSceneView+CTX.h
//  EFClass
//
//  Created by Stefan Ceriu on 28/11/2019.
//  Copyright © 2019 EF Education First. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSObject (CTX)

@end

UINSSceneView+CTX.m

//
//  UINSSceneView+CTX.m
//  EFClass
//
//  Created by Stefan Ceriu on 28/11/2019.
//  Copyright © 2019 EF Education First. All rights reserved.
//

#import "UINSSceneView+CTX.h"

#import <objc/runtime.h>

@implementation NSObject (CTX)

+ (void)load
{
#if TARGET_OS_MACCATALYST
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        CTXSwizzleInstanceMethod(objc_getClass("UINSSceneView"), NSSelectorFromString(@"scaleFactor"), @selector(ctx_scaleFactor));
    });
#endif
}

- (CGFloat)ctx_scaleFactor
{
    return 1.0f;
}

static void CTXSwizzleInstanceMethod(Class class, SEL originalSelector, SEL swizzledSelector) {
    Method originalMethod = class_getInstanceMethod(class, originalSelector);
    Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);
    
    if (class_addMethod(class, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod))) {
        class_replaceMethod(class, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod));
    } else {
        method_exchangeImplementations(originalMethod, swizzledMethod);
    }
}

@end

not work on macOS 11.3

macOS 11.3 has different APIs. I have made my implementation public: OverrideCatalystScaleFactor.swift

Nice! 👌