diff --git a/cmd/gomobile/bind.go b/cmd/gomobile/bind.go
index ef62d05..6a80e53 100644
--- a/cmd/gomobile/bind.go
+++ b/cmd/gomobile/bind.go
@@ -84,7 +84,7 @@
 	if bindJavaPkg != "" && targetOS != "android" {
 		return fmt.Errorf("-javapkg is supported only for android target")
 	}
-	if bindPrefix != "" && targetOS != "darwin" {
+	if bindPrefix != "" && targetOS != "ios" {
 		return fmt.Errorf("-prefix is supported only for ios target")
 	}
 
@@ -122,7 +122,7 @@
 	switch targetOS {
 	case "android":
 		return goAndroidBind(gobind, pkgs, targetArchs)
-	case "darwin":
+	case "ios":
 		if !xcodeAvailable() {
 			return fmt.Errorf("-target=ios requires XCode")
 		}
@@ -217,9 +217,6 @@
 	// Add CGO_ENABLED=1 explicitly since Cgo is disabled when GOOS is different from host OS.
 	config.Env = append(os.Environ(), "GOARCH=arm64", "GOOS="+targetOS, "CGO_ENABLED=1")
 	tags := buildTags
-	if targetOS == "darwin" {
-		tags = append(tags, "ios")
-	}
 	if len(tags) > 0 {
 		config.BuildFlags = []string{"-tags=" + strings.Join(tags, ",")}
 	}
@@ -232,9 +229,6 @@
 	cmd.Env = append(os.Environ(), "GOOS="+targetOS, "GOARCH="+targetArch)
 
 	tags := buildTags
-	if targetOS == "darwin" {
-		tags = append(tags, "ios")
-	}
 	// TODO(hyangah): probably we don't need to add all the dependencies.
 	cmd.Args = append(cmd.Args, "-m", "-json", "-tags="+strings.Join(tags, ","), "all")
 	cmd.Dir = src
diff --git a/cmd/gomobile/bind_iosapp.go b/cmd/gomobile/bind_iosapp.go
index 846a63f..e9615e8 100644
--- a/cmd/gomobile/bind_iosapp.go
+++ b/cmd/gomobile/bind_iosapp.go
@@ -67,11 +67,11 @@
 	}
 
 	for _, arch := range archs {
-		if err := writeGoMod("darwin", arch); err != nil {
+		if err := writeGoMod("ios", arch); err != nil {
 			return err
 		}
 
-		env := darwinEnv[arch]
+		env := iosEnv[arch]
 		// Add the generated packages to GOPATH for reverse bindings.
 		gopath := fmt.Sprintf("GOPATH=%s%c%s", tmpdir, filepath.ListSeparator, goEnv("GOPATH"))
 		env = append(env, gopath)
@@ -86,7 +86,7 @@
 
 		path, err := goIOSBindArchive(name, env, filepath.Join(tmpdir, "src"))
 		if err != nil {
-			return fmt.Errorf("darwin-%s: %v", arch, err)
+			return fmt.Errorf("ios-%s: %v", arch, err)
 		}
 		cmd.Args = append(cmd.Args, "-arch", archClang(arch), path)
 	}
diff --git a/cmd/gomobile/bind_test.go b/cmd/gomobile/bind_test.go
index b4d0657..5d6796c 100644
--- a/cmd/gomobile/bind_test.go
+++ b/cmd/gomobile/bind_test.go
@@ -196,7 +196,8 @@
 WORK=$WORK
 GOOS=darwin CGO_ENABLED=1 gobind -lang=go,objc -outdir=$WORK -tags=ios{{if .Prefix}} -prefix={{.Prefix}}{{end}} golang.org/x/mobile/asset
 mkdir -p $WORK/src
-PWD=$WORK/src GOOS=darwin GOARCH=arm64 CC=iphoneos-clang CXX=iphoneos-clang++ CGO_CFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_CXXFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_LDFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_ENABLED=1 GOPATH=$WORK:$GOPATH go build -tags ios -x -buildmode=c-archive -o $WORK/{{.Output}}-arm64.a ./gobind
+PWD=$WORK/src GOOS=ios GOARCH=arm64 CC=iphoneos-clang CXX=iphoneos-clang++ CGO_CFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_CXXFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_LDFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_ENABLED=1 GOPATH=$WORK:$GOPATH go mod tidy
+PWD=$WORK/src GOOS=ios GOARCH=arm64 CC=iphoneos-clang CXX=iphoneos-clang++ CGO_CFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_CXXFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_LDFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_ENABLED=1 GOPATH=$WORK:$GOPATH go build -x -buildmode=c-archive -o $WORK/{{.Output}}-arm64.a ./gobind
 rm -r -f "{{.Output}}.framework"
 mkdir -p {{.Output}}.framework/Versions/A/Headers
 ln -s A {{.Output}}.framework/Versions/Current
diff --git a/cmd/gomobile/build.go b/cmd/gomobile/build.go
index 83571fd..79705ad 100644
--- a/cmd/gomobile/build.go
+++ b/cmd/gomobile/build.go
@@ -127,13 +127,13 @@
 		if err != nil {
 			return nil, err
 		}
-	case "darwin":
+	case "ios":
 		if !xcodeAvailable() {
 			return nil, fmt.Errorf("-target=ios requires XCode")
 		}
 		if pkg.Name != "main" {
 			for _, arch := range targetArchs {
-				if err := goBuild(pkg.PkgPath, darwinEnv[arch]); err != nil {
+				if err := goBuild(pkg.PkgPath, iosEnv[arch]); err != nil {
 					return nil, err
 				}
 			}
@@ -291,13 +291,6 @@
 func goCmdAt(at string, subcmd string, srcs []string, env []string, args ...string) error {
 	cmd := exec.Command("go", subcmd)
 	tags := buildTags
-	targetOS, _, err := parseBuildTarget(buildTarget)
-	if err != nil {
-		return err
-	}
-	if targetOS == "darwin" {
-		tags = append(tags, "ios")
-	}
 	if len(tags) > 0 {
 		cmd.Args = append(cmd.Args, "-tags", strings.Join(tags, " "))
 	}
@@ -378,10 +371,6 @@
 	}
 
 	targetOS := os
-	if os == "ios" {
-		targetOS = "darwin"
-	}
-
 	seen := map[string]bool{}
 	for _, arch := range archNames {
 		if _, ok := seen[arch]; ok {
diff --git a/cmd/gomobile/build_darwin_test.go b/cmd/gomobile/build_darwin_test.go
index 50cf600..41fc382 100644
--- a/cmd/gomobile/build_darwin_test.go
+++ b/cmd/gomobile/build_darwin_test.go
@@ -104,11 +104,9 @@
 echo "{{template "infoplist" .Xinfo}}" > $WORK/main/Info.plist
 mkdir -p $WORK/main/Images.xcassets/AppIcon.appiconset
 echo "{{.Xcontents}}" > $WORK/main/Images.xcassets/AppIcon.appiconset/Contents.json{{end}}
-GOARM=7 GOOS=darwin GOARCH=arm CC=iphoneos-clang CXX=iphoneos-clang++ CGO_CFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch armv7 CGO_CXXFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch armv7 CGO_LDFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch armv7 CGO_ENABLED=1 go build -tags tag1 ios -x {{if .Main}}-ldflags=-w -o=$WORK/arm {{end}}{{.Pkg}}
-GOOS=darwin GOARCH=arm64 CC=iphoneos-clang CXX=iphoneos-clang++ CGO_CFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_CXXFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_LDFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_ENABLED=1 go build -tags tag1 ios -x {{if .Main}}-ldflags=-w -o=$WORK/arm64 {{end}}{{.Pkg}}
-GOOS=darwin GOARCH=386 CC=iphonesimulator-clang CXX=iphonesimulator-clang++ CGO_CFLAGS=-isysroot=iphonesimulator -mios-simulator-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch i386 CGO_CXXFLAGS=-isysroot=iphonesimulator -mios-simulator-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch i386 CGO_LDFLAGS=-isysroot=iphonesimulator -mios-simulator-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch i386 CGO_ENABLED=1 go build -tags tag1 ios -x {{if .Main}}-ldflags=-w -o=$WORK/386 {{end}}{{.Pkg}}
-GOOS=darwin GOARCH=amd64 CC=iphonesimulator-clang CXX=iphonesimulator-clang++ CGO_CFLAGS=-isysroot=iphonesimulator -mios-simulator-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch x86_64 CGO_CXXFLAGS=-isysroot=iphonesimulator -mios-simulator-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch x86_64 CGO_LDFLAGS=-isysroot=iphonesimulator -mios-simulator-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch x86_64 CGO_ENABLED=1 go build -tags tag1 ios -x {{if .Main}}-ldflags=-w -o=$WORK/amd64 {{end}}{{.Pkg}}{{if .Main}}
-xcrun lipo -o $WORK/main/main -create $WORK/arm $WORK/arm64 $WORK/386 $WORK/amd64
+GOOS=ios GOARCH=arm64 CC=iphoneos-clang CXX=iphoneos-clang++ CGO_CFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_CXXFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_LDFLAGS=-isysroot=iphoneos -miphoneos-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch arm64 CGO_ENABLED=1 go build -tags tag1 -x {{if .Main}}-ldflags=-w -o=$WORK/arm64 {{end}}{{.Pkg}}
+GOOS=ios GOARCH=amd64 CC=iphonesimulator-clang CXX=iphonesimulator-clang++ CGO_CFLAGS=-isysroot=iphonesimulator -mios-simulator-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch x86_64 CGO_CXXFLAGS=-isysroot=iphonesimulator -mios-simulator-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch x86_64 CGO_LDFLAGS=-isysroot=iphonesimulator -mios-simulator-version-min=7.0 {{if .BitcodeEnabled}}-fembed-bitcode {{end}}-arch x86_64 CGO_ENABLED=1 go build -tags tag1 -x {{if .Main}}-ldflags=-w -o=$WORK/amd64 {{end}}{{.Pkg}}{{if .Main}}
+xcrun lipo -o $WORK/main/main -create $WORK/arm64 $WORK/amd64
 mkdir -p $WORK/main/assets
 xcrun xcodebuild -configuration Release -project $WORK/main.xcodeproj -allowProvisioningUpdates DEVELOPMENT_TEAM={{.TeamID}}
 mv $WORK/build/Release-iphoneos/main.app basic.app{{end}}
diff --git a/cmd/gomobile/build_iosapp.go b/cmd/gomobile/build_iosapp.go
index eeb1d7d..e516d27 100644
--- a/cmd/gomobile/build_iosapp.go
+++ b/cmd/gomobile/build_iosapp.go
@@ -80,12 +80,12 @@
 	for _, arch := range archs {
 		path := filepath.Join(tmpdir, arch)
 		// Disable DWARF; see golang.org/issues/25148.
-		if err := goBuild(src, darwinEnv[arch], "-ldflags=-w", "-o="+path); err != nil {
+		if err := goBuild(src, iosEnv[arch], "-ldflags=-w", "-o="+path); err != nil {
 			return nil, err
 		}
 		if nmpkgs == nil {
 			var err error
-			nmpkgs, err = extractPkgs(darwinArmNM, path)
+			nmpkgs, err = extractPkgs(iosArmNM, path)
 			if err != nil {
 				return nil, err
 			}
diff --git a/cmd/gomobile/build_test.go b/cmd/gomobile/build_test.go
index eb75bc6..f7eab6c 100644
--- a/cmd/gomobile/build_test.go
+++ b/cmd/gomobile/build_test.go
@@ -128,10 +128,10 @@
 		{"android,android/arm", false, "android", androidArchs},
 		{"android/arm", false, "android", "arm"},
 
-		{"ios", false, "darwin", iosArchs},
-		{"ios,ios/arm64", false, "darwin", iosArchs},
-		{"ios/arm64", false, "darwin", "arm64"},
-		{"ios/amd64", false, "darwin", "amd64"},
+		{"ios", false, "ios", iosArchs},
+		{"ios,ios/arm64", false, "ios", iosArchs},
+		{"ios/arm64", false, "ios", "arm64"},
+		{"ios/amd64", false, "ios", "amd64"},
 
 		{"", true, "", ""},
 		{"linux", true, "", ""},
diff --git a/cmd/gomobile/doc.go b/cmd/gomobile/doc.go
index 5f86054..aeff5f6 100644
--- a/cmd/gomobile/doc.go
+++ b/cmd/gomobile/doc.go
@@ -9,10 +9,10 @@
 
 To install:
 
-	$ go get golang.org/x/mobile/cmd/gomobile
+	$ go install golang.org/x/mobile/cmd/gomobile@latest
 	$ gomobile init
 
-At least Go 1.10 is required.
+At least Go 1.16 is required.
 For detailed instructions, see https://golang.org/wiki/Mobile.
 
 Usage:
diff --git a/cmd/gomobile/env.go b/cmd/gomobile/env.go
index 13b0ab0..de0b46e 100644
--- a/cmd/gomobile/env.go
+++ b/cmd/gomobile/env.go
@@ -17,10 +17,10 @@
 
 	androidEnv map[string][]string // android arch -> []string
 
-	darwinEnv map[string][]string
+	iosEnv map[string][]string
 
 	androidArmNM string
-	darwinArmNM  string
+	iosArmNM     string
 
 	bitcodeEnabled bool
 )
@@ -139,8 +139,8 @@
 		return nil
 	}
 
-	darwinArmNM = "nm"
-	darwinEnv = make(map[string][]string)
+	iosArmNM = "nm"
+	iosEnv = make(map[string][]string)
 	for _, arch := range allArchs("ios") {
 		var env []string
 		var err error
@@ -163,7 +163,7 @@
 			cflags += " -fembed-bitcode"
 		}
 		env = append(env,
-			"GOOS=darwin",
+			"GOOS=ios",
 			"GOARCH="+arch,
 			"CC="+clang,
 			"CXX="+clang+"++",
@@ -172,7 +172,7 @@
 			"CGO_LDFLAGS="+cflags+" -arch "+archClang(arch),
 			"CGO_ENABLED=1",
 		)
-		darwinEnv[arch] = env
+		iosEnv[arch] = env
 	}
 
 	return nil
diff --git a/cmd/gomobile/main.go b/cmd/gomobile/main.go
index 91b90b4..9814a0d 100644
--- a/cmd/gomobile/main.go
+++ b/cmd/gomobile/main.go
@@ -94,8 +94,8 @@
 		// Ignore unknown versions; it's probably a devel version.
 		return nil
 	}
-	if minor < 10 {
-		return errors.New("Go 1.10 or newer is required")
+	if minor < 16 {
+		return errors.New("Go 1.16 or newer is required")
 	}
 	return nil
 }
@@ -186,10 +186,10 @@
 
 To install:
 
-	$ go get golang.org/x/mobile/cmd/gomobile
+	$ go install golang.org/x/mobile/cmd/gomobile@latest
 	$ gomobile init
 
-At least Go 1.10 is required.
+At least Go 1.16 is required.
 For detailed instructions, see https://golang.org/wiki/Mobile.
 
 Usage:
diff --git a/example/basic/main.go b/example/basic/main.go
index 110d052..697fe21 100644
--- a/example/basic/main.go
+++ b/example/basic/main.go
@@ -7,8 +7,7 @@
 
 // An app that draws a green triangle on a red background.
 //
-// Note: This demo is an early preview of Go 1.5. In order to build this
-// program as an Android APK using the gomobile tool.
+// In order to build this program as an Android APK, using the gomobile tool.
 //
 // See http://godoc.org/golang.org/x/mobile/cmd/gomobile to install gomobile.
 //
diff --git a/go.mod b/go.mod
index ec65e6a..c702aa4 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module golang.org/x/mobile
 
-go 1.11
+go 1.16
 
 require (
 	golang.org/x/exp v0.0.0-20190731235908-ec7cb31e5a56
diff --git a/internal/mobileinit/mobileinit_ios.go b/internal/mobileinit/mobileinit_ios.go
index e0d1385..d41b228 100644
--- a/internal/mobileinit/mobileinit_ios.go
+++ b/internal/mobileinit/mobileinit_ios.go
@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build ios
-// +build ios
-
 package mobileinit
 
 import (