diff --git a/README.md b/README.md
index bcfbdd3..928419a 100644
--- a/README.md
+++ b/README.md
@@ -113,7 +113,7 @@ codevhub skill office --platform macos --arch arm64   # macOS needs a chip: arm6
 codevhub skill office --dir /media/usb/codev-office   # download somewhere else
 ```
 
-Because macOS has one bundle per chip, `--platform macos` from a non-Mac also needs `--arch arm64` or `--arch x86_64` — nothing on a Linux or Windows host implies which Mac the bundle is for, and guessing costs a 1.7 GB download. On a Mac the chip is detected for you (including through Rosetta), and `--arch` is only needed to stage a bundle for the *other* chip. There is still a single macOS setup script: it resolves its own bundle from `uname -m`.
+Because macOS has one bundle per chip, `--platform macos` from a non-Mac also needs `--arch arm64` or `--arch x86_64` — nothing on a Linux or Windows host implies which Mac the bundle is for. On a Mac the chip is detected for you (including through Rosetta), and `--arch` is only needed to stage a bundle for the *other* chip. There is still a single macOS setup script: it resolves its own bundle from `uname -m`.
 
 Both files land side by side, and the command prints the exact line to run from that folder (`bash codev-office-<os>-setup.sh`, or `powershell -ExecutionPolicy Bypass -File .\codev-office-windows-setup.ps1`). A bundle downloaded for another OS is never executed on this machine.
 
diff --git a/package.json b/package.json
index 8f1f4f2..1a8de4e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "codev-ai",
-  "version": "0.5.14",
+  "version": "0.5.15",
   "description": "CoDev — AI Coding Agent Hub. Install, configure, and manage multiple AI coding agents.",
   "keywords": [
     "ai",
diff --git a/src/lib/office.ts b/src/lib/office.ts
index 6337ffe..484d5bb 100644
--- a/src/lib/office.ts
+++ b/src/lib/office.ts
@@ -65,8 +65,8 @@ export function detectPlatform(
 // process.arch is the architecture of the NODE BINARY, not of the machine: an
 // x64 node running under Rosetta on Apple Silicon reports "x64". Trusting it
 // there would fetch the Intel bundle onto an M-series Mac, and the cost is not
-// just the wrong 1.7 GB — the setup script is native bash, sees `uname -m` =
-// arm64, finds no bundle it can use and downloads another 1.7 GB. The
+// just the wrong 1.6 GB — the setup script is native bash, sees `uname -m` =
+// arm64, finds no bundle it can use and downloads another 1.6 GB. The
 // sysctl.proc_translated flag is the supported way to detect the translation.
 function isRosettaTranslated(): boolean {
 	if (process.platform !== "darwin" || process.arch !== "x64") return false;
@@ -236,8 +236,8 @@ export function officeUninstallScriptName(platform: OfficePlatform): string {
 const APPROX_BUNDLE_MB: Record<OfficeTarget, number> = {
 	ubuntu: 1200,
 	windows: 1400,
-	"macos-arm64": 1700,
-	"macos-x86_64": 1700,
+	"macos-arm64": 1600,
+	"macos-x86_64": 1600,
 };
 
 // Adaptive size for progress lines: the setup script is ~13 KB and rendered
@@ -431,7 +431,7 @@ export async function runSkillOffice(
 	// macOS publishes one bundle per chip, so a macOS download needs an arch.
 	// The host's own arch may only stand in for it when the host IS the target:
 	// on a Linux/Windows x64 box, detectArch() would confidently answer x86_64
-	// for a `--platform macos` download and hand the user the wrong 1.7 GB.
+	// for a `--platform macos` download and hand the user the wrong 1.6 GB.
 	// --arch always wins, including on a Mac staging a bundle for the other chip.
 	const arch = parsed.arch ?? (crossPlatform ? null : detectArch());
 	const target = officeTarget(platform, arch);
diff --git a/tests/lib/download.test.ts b/tests/lib/download.test.ts
index 589df1b..cc504c8 100644
--- a/tests/lib/download.test.ts
+++ b/tests/lib/download.test.ts
@@ -386,7 +386,7 @@ describe("runSkillOffice", () => {
 
 	// macOS publishes one bundle per chip. From another OS nothing implies
 	// which, and the host's own x64 would be a confident wrong answer costing
-	// 1.7 GB — so this must fail loudly instead of picking a default.
+	// 1.6 GB — so this must fail loudly instead of picking a default.
 	// Pinned to linux so the macOS bundle is always the cross-platform case,
 	// whichever machine runs the suite.
 	test("a macOS bundle from another OS refuses without --arch", async () => {
diff --git a/tests/lib/office.test.ts b/tests/lib/office.test.ts
index ec917c2..4fde395 100644
--- a/tests/lib/office.test.ts
+++ b/tests/lib/office.test.ts
@@ -36,7 +36,7 @@ describe("detectArch", () => {
 
 	// An x64 node under Rosetta reports "x64" on an Apple Silicon Mac. Believing
 	// it downloads the Intel bundle, which the native-bash setup script then
-	// refuses — and re-downloads the arm64 one. 3.4 GB to land 1.7.
+	// refuses — and re-downloads the arm64 one. 3.2 GB to land 1.6.
 	test("Rosetta translation overrides the reported x64", () => {
 		expect(detectArch("x64", true)).toBe("arm64");
 	});
@@ -54,7 +54,7 @@ describe("officeTarget", () => {
 		expect(officeTarget("macos", "x86_64")).toBe("macos-x86_64");
 	});
 
-	test("macOS without an arch has no target — never guess a 1.7 GB download", () => {
+	test("macOS without an arch has no target — never guess a 1.6 GB download", () => {
 		expect(officeTarget("macos", null)).toBeNull();
 	});
 });