[BUG][0.12.1] Unable to install on `mac10.13`

[roblav96]

Context:

• Playwright Version: v0.12.1
• Operating System: Mac
• Extra: macOS High Sierra 10.13.6

Code Snippet
npm install playwright-core playwright-chromium

~/project on  master [!?] 
$ npm install playwright-core playwright-chromium

> playwright-chromium@0.12.1 install /Users/admin/project/node_modules/playwright-chromium
> node install.js

(node:54634) UnhandledPromiseRejectionWarning: TypeError: path.join is not iterable (cannot read property Symbol(Symbol.iterator))
    at Object.executablePath (/Users/admin/project/node_modules/playwright-core/lib/server/browserFetcher.js:125:17)
    at downloadOptionsFromENV (/Users/admin/project/node_modules/playwright-core/download-browser.js:44:36)
    at /Users/admin/project/node_modules/playwright-chromium/install.js:21:40
    at Object.<anonymous> (/Users/admin/project/node_modules/playwright-chromium/install.js:22:3)
    at Module._compile (internal/modules/cjs/loader.js:1147:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1167:10)
    at Module.load (internal/modules/cjs/loader.js:996:32)
    at Function.Module._load (internal/modules/cjs/loader.js:896:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)
    at internal/main/run_main_module.js:17:47

Describe the bug

Can't npm install playwright-chromium, throws at lib/server/browserFetcher.js:125:17<executablePath> due to mac10.13 not being mapped on the RELATIVE_EXECUTABLE_PATHS.

[mxschmitt]

Which Node.js version are you using?

[roblav96]

@mxschmitt

$ node -v
v13.11.0

$ npm -v
6.14.3

[roblav96]

The sw_vers -productVersion resulting in mac10.13 need to be mapped on the variables DOWNLOAD_URLS and RELATIVE_EXECUTABLE_PATHS

[mxschmitt]

In theory we could probably just fire up a Pull Request to add the mapping there. But not sure if Playwright will support Mac OS 10.13 (was released in September 2017).
Also the error handling could be improved if an unsupported OS/Version will be used.

cc @JoelEinbinder

[dgozman]

We are currently only building bundling WebKit and Firefox for 10.14 and 10.15. @aslushnikov, do you think 10.13 is viable?

[aslushnikov]

• I don't think we can build WebKit for 10.13.
• Firefox and Chromium might work on 10.13, but we don't have a 10.13 mac to check it. If someone with 10.13 can try fix(browserFetcher): support macos 10.13 for firefox and chromium #1549 and see if our downloaded FIrefox / Chromium binaries work, it'll be very helpful!

[roblav96]

We are currently only building bundling WebKit and Firefox for 10.14 and 10.15. @aslushnikov, do you think 10.13 is viable?

I believe 10.13 is still viable as long as homebrew continues to publish a :high_sierra bottle for the node formula.

[aslushnikov]

Fixed with #1549