diff --git a/Package@swift-5.6.swift b/Package@swift-5.6.swift
deleted file mode 100644
index e00eccd061..0000000000
--- a/Package@swift-5.6.swift
+++ /dev/null
@@ -1,56 +0,0 @@
-// swift-tools-version:5.6
-// The swift-tools-version declares the minimum version of Swift required to build this package.
-
-import PackageDescription
-import class Foundation.ProcessInfo
-
-// Only add DocC Plugin when building docs, so that clients of this library won't
-// unnecessarily also get the DocC Plugin
-let environmentVariables = ProcessInfo.processInfo.environment
-let shouldIncludeDocCPlugin = environmentVariables["INCLUDE_DOCC_PLUGIN"] == "true"
-
-var dependencies: [Package.Dependency] = [
-    .package(url: "git@github.com:Quick/Nimble.git", from: "10.0.0")
-]
-if shouldIncludeDocCPlugin {
-    dependencies.append(.package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0"))
-}
-
-let package = Package(
-    name: "RevenueCat",
-    platforms: [
-        .macOS(.v10_13),
-        .watchOS("6.2"),
-        .tvOS(.v11),
-        .iOS(.v11)
-    ],
-    products: [
-        .library(name: "RevenueCat",
-                 targets: ["RevenueCat"]),
-        .library(name: "RevenueCat_CustomEntitlementComputation",
-                 targets: ["RevenueCat_CustomEntitlementComputation"]),
-        .library(name: "ReceiptParser",
-                 targets: ["ReceiptParser"])
-    ],
-    dependencies: dependencies,
-    targets: [
-        .target(name: "RevenueCat",
-                path: "Sources",
-                exclude: ["Info.plist", "LocalReceiptParsing/ReceiptParser-only-files"],
-                resources: [
-                    .copy("../Sources/PrivacyInfo.xcprivacy")
-                ]),
-        .target(name: "RevenueCat_CustomEntitlementComputation",
-                path: "CustomEntitlementComputation",
-                exclude: ["Info.plist", "LocalReceiptParsing/ReceiptParser-only-files"],
-                resources: [
-                    .copy("PrivacyInfo.xcprivacy")
-                ],
-                swiftSettings: [.define("ENABLE_CUSTOM_ENTITLEMENT_COMPUTATION")]),
-        .target(name: "ReceiptParser",
-                path: "LocalReceiptParsing"),
-        .testTarget(name: "ReceiptParserTests",
-                    dependencies: ["ReceiptParser", "Nimble"],
-                    exclude: ["ReceiptParserTests-Info.plist"])
-    ]
-)
diff --git a/Sources/Identity/CustomerInfo.swift b/Sources/Identity/CustomerInfo.swift
index 875394c5c0..99e1838cb4 100644
--- a/Sources/Identity/CustomerInfo.swift
+++ b/Sources/Identity/CustomerInfo.swift
@@ -272,14 +272,7 @@ extension CustomerInfo: RawDataContainer {
 
 }
 
-#if swift(>=5.7)
 extension CustomerInfo: Sendable {}
-#else
-// `@unchecked` because:
-// - `Date` is not `Sendable` until Swift 5.7
-// - `URL` is not `Sendable` until Swift 5.7
-extension CustomerInfo: @unchecked Sendable {}
-#endif
 
 /// `CustomerInfo`'s `Codable` implementation relies on `Data`
 extension CustomerInfo: Codable {
diff --git a/Sources/LocalReceiptParsing/BasicTypes/AppleReceipt.swift b/Sources/LocalReceiptParsing/BasicTypes/AppleReceipt.swift
index 18b61aaef7..3e73d3c1a4 100644
--- a/Sources/LocalReceiptParsing/BasicTypes/AppleReceipt.swift
+++ b/Sources/LocalReceiptParsing/BasicTypes/AppleReceipt.swift
@@ -64,13 +64,7 @@ public struct AppleReceipt: Equatable {
 
 }
 
-#if swift(>=5.7)
 extension AppleReceipt: Sendable {}
-#else
-// `@unchecked` because:
-// - `Date` is not `Sendable` until Swift 5.7
-extension AppleReceipt: @unchecked Sendable {}
-#endif
 
 // MARK: - Extensions
 
diff --git a/Sources/LocalReceiptParsing/BasicTypes/InAppPurchase.swift b/Sources/LocalReceiptParsing/BasicTypes/InAppPurchase.swift
index b6e1c5aecf..b7fe9ae377 100644
--- a/Sources/LocalReceiptParsing/BasicTypes/InAppPurchase.swift
+++ b/Sources/LocalReceiptParsing/BasicTypes/InAppPurchase.swift
@@ -193,13 +193,7 @@ extension AppleReceipt.InAppPurchase {
 
 extension AppleReceipt.InAppPurchase.ProductType: Sendable {}
 
-#if swift(>=5.7)
 extension AppleReceipt.InAppPurchase: Sendable {}
-#else
-// `@unchecked` because:
-// - `Date` is not `Sendable` until Swift 5.7
-extension AppleReceipt.InAppPurchase: @unchecked Sendable {}
-#endif
 
 extension AppleReceipt.InAppPurchase.ProductType: Codable {}
 extension AppleReceipt.InAppPurchase: Codable {}
diff --git a/Sources/Misc/Concurrency/Lock.swift b/Sources/Misc/Concurrency/Lock.swift
index da3e299b87..32c61b62d1 100644
--- a/Sources/Misc/Concurrency/Lock.swift
+++ b/Sources/Misc/Concurrency/Lock.swift
@@ -26,12 +26,7 @@ internal final class Lock {
 
     }
 
-    #if swift(>=5.7)
     private typealias UnderlyingType = NSLocking & Sendable
-    #else
-    // `NSRecursiveLock` and `NSLock` aren't `Sendable` until iOS 16.0 / Swift 5.7
-    private typealias UnderlyingType = NSLocking
-    #endif
 
     private let lock: UnderlyingType
     private init(_ lock: UnderlyingType) { self.lock = lock }
@@ -51,12 +46,7 @@ internal final class Lock {
 
 }
 
-#if swift(>=5.7)
 extension Lock: Sendable {}
-#else
-// `Lock.UnderlyingType` isn't `Sendable` until Swift 5.7
-extension Lock: @unchecked Sendable {}
-#endif
 
 private extension Lock.LockType {
 
diff --git a/Sources/Misc/SystemInfo.swift b/Sources/Misc/SystemInfo.swift
index 22423aa6e0..85f602674f 100644
--- a/Sources/Misc/SystemInfo.swift
+++ b/Sources/Misc/SystemInfo.swift
@@ -269,9 +269,6 @@ private extension SystemInfo {
             return Bundle.main.infoDictionary?.keys.contains("WKApplication") == true
         }
 
-        // In Xcode 14 and later, you can produce watchOS apps with a single watchOS app target.
-        // These single-target watchOS apps can run on watchOS 7 and later.
-        #if swift(>=5.7)
         if #available(watchOS 7.0, *), self.isOperatingSystemAtLeast(.init(majorVersion: 9,
                                                                            minorVersion: 0,
                                                                            patchVersion: 0)) {
@@ -288,15 +285,6 @@ private extension SystemInfo {
                 return WKExtension.shared().applicationState == .background
             }
         }
-        #else
-        // In Xcode 13 and earlier the system divides a watchOS app into two sections
-        // (single-target apps are not supported):
-        // - WatchKit app
-        // - WatchKit extension
-
-        // Before Xcode 14, single-target extensions aren't supported (and `WKApplication` isn't available)
-        return WKExtension.shared().applicationState == .background
-        #endif
     }
 
     #endif
diff --git a/Sources/Purchasing/CachingProductsManager.swift b/Sources/Purchasing/CachingProductsManager.swift
index b4baffb51d..508ec5d0ed 100644
--- a/Sources/Purchasing/CachingProductsManager.swift
+++ b/Sources/Purchasing/CachingProductsManager.swift
@@ -22,13 +22,8 @@ final class CachingProductsManager {
     private let productCache: Atomic<[String: StoreProduct]> = .init([:])
     private let requestCache: Atomic<[Set<String>: [Completion]]> = .init([:])
 
-    #if swift(>=5.7)
     private let _sk2ProductCache: (any Sendable)?
     private let _sk2RequestCache: (any Sendable)?
-    #else
-    private let _sk2ProductCache: Any?
-    private let _sk2RequestCache: Any?
-    #endif
 
     @available(iOS 15.0, tvOS 15.0, watchOS 8.0, macOS 12.0, *)
     private var sk2ProductCache: Atomic<[String: SK2StoreProduct]> {
diff --git a/Sources/Purchasing/EntitlementInfo.swift b/Sources/Purchasing/EntitlementInfo.swift
index 285d64d9bb..59eca98573 100644
--- a/Sources/Purchasing/EntitlementInfo.swift
+++ b/Sources/Purchasing/EntitlementInfo.swift
@@ -340,10 +340,4 @@ private extension EntitlementInfo {
 
 }
 
-#if swift(>=5.7)
 extension EntitlementInfo.Contents: Sendable {}
-#else
-// `@unchecked` because:
-// - `Date` is not `Sendable` until Swift 5.7
-extension EntitlementInfo.Contents: @unchecked Sendable {}
-#endif
diff --git a/Sources/Purchasing/NonSubscriptionTransaction.swift b/Sources/Purchasing/NonSubscriptionTransaction.swift
index a4e55a4a37..72705af283 100644
--- a/Sources/Purchasing/NonSubscriptionTransaction.swift
+++ b/Sources/Purchasing/NonSubscriptionTransaction.swift
@@ -62,10 +62,4 @@ public final class NonSubscriptionTransaction: NSObject {
 
 }
 
-#if swift(>=5.7)
 extension NonSubscriptionTransaction: Sendable {}
-#else
-// `@unchecked` because:
-// - `Date` is not `Sendable` until Swift 5.7
-extension NonSubscriptionTransaction: @unchecked Sendable {}
-#endif
diff --git a/Sources/Purchasing/ProductsManager.swift b/Sources/Purchasing/ProductsManager.swift
index 70d3c8e984..f5a8b944ef 100644
--- a/Sources/Purchasing/ProductsManager.swift
+++ b/Sources/Purchasing/ProductsManager.swift
@@ -52,11 +52,7 @@ class ProductsManager: NSObject, ProductsManagerType {
     private let productsFetcherSK1: ProductsFetcherSK1
     private let systemInfo: SystemInfo
 
-#if swift(>=5.7)
     private let _productsFetcherSK2: (any Sendable)?
-#else
-    private let _productsFetcherSK2: Any?
-#endif
 
     @available(iOS 15.0, tvOS 15.0, watchOS 8.0, macOS 12.0, *)
     private var productsFetcherSK2: ProductsFetcherSK2 {
diff --git a/Sources/Purchasing/StoreKit2/StoreKit2TransactionListener.swift b/Sources/Purchasing/StoreKit2/StoreKit2TransactionListener.swift
index cac832a374..dada7b4029 100644
--- a/Sources/Purchasing/StoreKit2/StoreKit2TransactionListener.swift
+++ b/Sources/Purchasing/StoreKit2/StoreKit2TransactionListener.swift
@@ -60,18 +60,9 @@ actor StoreKit2TransactionListener: StoreKit2TransactionListenerType {
     private weak var delegate: StoreKit2TransactionListenerDelegate?
     private let updates: AsyncStream<TransactionResult>
 
-    #if swift(<5.7)
-    // Note that these 2 constructors are duplicated because
-    // not having convinience here is an error in Xcode 13
-    // But having it is an error in Xcode 14.
-    convenience init(delegate: StoreKit2TransactionListenerDelegate? = nil) {
-        self.init(delegate: delegate, updates: StoreKit.Transaction.updates)
-    }
-    #else
     init(delegate: StoreKit2TransactionListenerDelegate? = nil) {
         self.init(delegate: delegate, updates: StoreKit.Transaction.updates)
     }
-    #endif
 
     /// Creates a listener with an `AsyncSequence` of `VerificationResult<Transaction>`s
     /// By default `StoreKit.Transaction.updates` is used, but a custom one can be passed for testing.
diff --git a/Sources/Purchasing/StoreKitAbstractions/PromotionalOffer.swift b/Sources/Purchasing/StoreKitAbstractions/PromotionalOffer.swift
index 96e6d9d61a..40f31d73c4 100644
--- a/Sources/Purchasing/StoreKitAbstractions/PromotionalOffer.swift
+++ b/Sources/Purchasing/StoreKitAbstractions/PromotionalOffer.swift
@@ -92,13 +92,7 @@ extension PromotionalOffer: Sendable {}
 
 }
 
-#if swift(>=5.7)
 extension PromotionalOffer.SignedData: Sendable {}
-#else
-// `@unchecked` because:
-// - `UUID` is not `Sendable` until Swift 5.7
-extension PromotionalOffer.SignedData: @unchecked Sendable {}
-#endif
 
 extension PromotionalOffer.SignedData {
 
diff --git a/Sources/Purchasing/StoreKitAbstractions/SK1StoreProduct.swift b/Sources/Purchasing/StoreKitAbstractions/SK1StoreProduct.swift
index 5e16279dc8..824887c72c 100644
--- a/Sources/Purchasing/StoreKitAbstractions/SK1StoreProduct.swift
+++ b/Sources/Purchasing/StoreKitAbstractions/SK1StoreProduct.swift
@@ -96,8 +96,3 @@ extension SK1StoreProduct: Hashable {
     }
 
 }
-
-#if swift(<5.7)
-// `SK1Product` isn't `Sendable` until iOS 16.0 / Swift 5.7
-extension SK1StoreProduct: @unchecked Sendable {}
-#endif
diff --git a/Sources/Purchasing/StoreKitAbstractions/SK1StoreProductDiscount.swift b/Sources/Purchasing/StoreKitAbstractions/SK1StoreProductDiscount.swift
index 59df0d6139..191920cdee 100644
--- a/Sources/Purchasing/StoreKitAbstractions/SK1StoreProductDiscount.swift
+++ b/Sources/Purchasing/StoreKitAbstractions/SK1StoreProductDiscount.swift
@@ -61,12 +61,6 @@ internal struct SK1StoreProductDiscount: StoreProductDiscountType {
 
 }
 
-#if swift(<5.7)
-// `SK1ProductDiscount` isn't `Sendable` until iOS 16.0 / Swift 5.7
-@available(iOS 11.2, macOS 10.13.2, tvOS 11.2, watchOS 6.2, *)
-extension SK1StoreProductDiscount: @unchecked Sendable {}
-#endif
-
 // MARK: - Private
 
 private extension StoreProductDiscount.PaymentMode {
diff --git a/Sources/Purchasing/StoreKitAbstractions/SK1StoreTransaction.swift b/Sources/Purchasing/StoreKitAbstractions/SK1StoreTransaction.swift
index 7b32277859..4a20357222 100644
--- a/Sources/Purchasing/StoreKitAbstractions/SK1StoreTransaction.swift
+++ b/Sources/Purchasing/StoreKitAbstractions/SK1StoreTransaction.swift
@@ -91,10 +91,3 @@ extension SKPaymentTransaction {
     }
 
 }
-
-#if swift(<5.7)
-// `@unchecked` because:
-// - `Date` is not `Sendable` until Swift 5.7
-// - `SK1Transaction` is not `Sendable` until Swift 5.7
-extension SK1StoreTransaction: @unchecked Sendable {}
-#endif
diff --git a/Sources/Purchasing/StoreKitAbstractions/SK1Storefront.swift b/Sources/Purchasing/StoreKitAbstractions/SK1Storefront.swift
index 944519641d..40ec0b1000 100644
--- a/Sources/Purchasing/StoreKitAbstractions/SK1Storefront.swift
+++ b/Sources/Purchasing/StoreKitAbstractions/SK1Storefront.swift
@@ -29,9 +29,3 @@ internal struct SK1Storefront: StorefrontType {
     let countryCode: String
 
 }
-
-#if swift(<5.7)
-// `SKStorefront` isn't `Sendable` until iOS 16.0 / Swift 5.7
-@available(iOS 13.0, macOS 10.15, tvOS 13.0, watchOS 6.2, macCatalyst 13.1, *)
-extension SK1Storefront: @unchecked Sendable {}
-#endif
diff --git a/Sources/Purchasing/StoreKitAbstractions/SK2StoreProduct.swift b/Sources/Purchasing/StoreKitAbstractions/SK2StoreProduct.swift
index 14c1e2bb88..9d508e104a 100644
--- a/Sources/Purchasing/StoreKitAbstractions/SK2StoreProduct.swift
+++ b/Sources/Purchasing/StoreKitAbstractions/SK2StoreProduct.swift
@@ -128,9 +128,3 @@ extension SK2StoreProduct: Hashable {
     }
 
 }
-
-#if swift(<5.7)
-// `SK2Product` isn't `Sendable` until iOS 16.0 / Swift 5.7
-@available(iOS 15.0, tvOS 15.0, watchOS 8.0, macOS 12.0, *)
-extension SK2StoreProduct: @unchecked Sendable {}
-#endif
diff --git a/Sources/Purchasing/StoreKitAbstractions/SK2StoreProductDiscount.swift b/Sources/Purchasing/StoreKitAbstractions/SK2StoreProductDiscount.swift
index ad47401472..0d78247b84 100644
--- a/Sources/Purchasing/StoreKitAbstractions/SK2StoreProductDiscount.swift
+++ b/Sources/Purchasing/StoreKitAbstractions/SK2StoreProductDiscount.swift
@@ -46,12 +46,6 @@ internal struct SK2StoreProductDiscount: StoreProductDiscountType {
     var localizedPriceString: String { underlyingSK2Discount.displayPrice }
 }
 
-#if swift(<5.7)
-// `SK2ProductDiscount` isn't `Sendable` until iOS 16.0 / Swift 5.7
-@available(iOS 15.0, tvOS 15.0, watchOS 8.0, macOS 12.0, *)
-extension SK2StoreProductDiscount: @unchecked Sendable {}
-#endif
-
 // MARK: - Private
 
 private extension StoreProductDiscount.PaymentMode {
diff --git a/Sources/Purchasing/StoreKitAbstractions/SK2StoreTransaction.swift b/Sources/Purchasing/StoreKitAbstractions/SK2StoreTransaction.swift
index c65a5046fc..b488fdac1d 100644
--- a/Sources/Purchasing/StoreKitAbstractions/SK2StoreTransaction.swift
+++ b/Sources/Purchasing/StoreKitAbstractions/SK2StoreTransaction.swift
@@ -53,11 +53,3 @@ internal struct SK2StoreTransaction: StoreTransactionType {
     }
 
 }
-
-#if swift(<5.7)
-// `@unchecked` because:
-// - `Date` is not `Sendable` until Swift 5.7
-// - `SK2Transaction` is not `Sendable` until Swift 5.7
-@available(iOS 15.0, tvOS 15.0, watchOS 8.0, macOS 12.0, *)
-extension SK2StoreTransaction: @unchecked Sendable {}
-#endif
diff --git a/Sources/Purchasing/StoreKitAbstractions/SK2Storefront.swift b/Sources/Purchasing/StoreKitAbstractions/SK2Storefront.swift
index 11b3a5583d..278b1cf127 100644
--- a/Sources/Purchasing/StoreKitAbstractions/SK2Storefront.swift
+++ b/Sources/Purchasing/StoreKitAbstractions/SK2Storefront.swift
@@ -29,9 +29,3 @@ internal struct SK2Storefront: StorefrontType {
     let countryCode: String
 
 }
-
-#if swift(<5.7)
-// `SKStorefront` isn't `Sendable` until iOS 16.0 / Swift 5.7
-@available(iOS 15.0, tvOS 15.0, watchOS 8.0, macOS 12.0, *)
-extension SK2Storefront: @unchecked Sendable {}
-#endif
diff --git a/Tests/UnitTests/Mocks/MockStoreTransaction.swift b/Tests/UnitTests/Mocks/MockStoreTransaction.swift
index 9afbc32997..3809895bfc 100644
--- a/Tests/UnitTests/Mocks/MockStoreTransaction.swift
+++ b/Tests/UnitTests/Mocks/MockStoreTransaction.swift
@@ -64,9 +64,3 @@ final class MockStoreTransaction: StoreTransactionType {
     }
 
 }
-
-#if swift(<5.7)
-// `@unchecked` because:
-// - `Date` is not `Sendable` until Swift 5.7
-extension MockStoreTransaction: @unchecked Sendable {}
-#endif