fletd issue ‘dyld: Symbol not found: _utimensat’ on macOS 10.12.6

[ybz-zh]

Description

Code example to reproduce the issue:

import flet as ft
def main(page: ft.Page):
    # add/update controls on Page
    pass
ft.app(target=main)

Error message

Flet version:
flet-0.2.4

Python version:
Python-3.7.5

macOS version:
10.12.6

[ndonkoHenri]

Can you try this instead please?

import flet as ft

def main(page: ft.Page):
    t = ft.Text(value="Hello, world!", color="green")
    page.controls.append(t)
    page.update()

ft.app(target=main)

You should be able to see a "Hello World".
Let me have your feedback if your said issue persists.

[FeodorFitsner]

I don't think Flutter 3.x is compatible with macOS Sierra.

Despite the official docs are saying "macOS 10.11 and later" I think that was for Flutter 2.x or docs are just not updated. Look, there is an issue to increase macOS requirements from 10.11 to 10.13 which is merged on July and there is even another issue (still open) to bump it even further from 10.13 to 10.14 (Mojave which is EOT a year ago).

[ybz-zh]

Thanks :) @ndonkoHenri @FeodorFitsner

Looks like a incompatibility issue.

$ ./fletd -v
0.2.4
$ ./fletd
INFO[2022-12-29T20:47:01+08:00] Using in-memory cache
[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.

[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.

• using env: export GIN_MODE=release
• using code: gin.SetMode(gin.ReleaseMode)
  ...
  $ sw_vers
  ProductName: Mac OS X
  ProductVersion: 10.14.6

$ ./fletd -v
dyld: Symbol not found: _utimensat
Referenced from: /Users/xxx/.flet/bin/fletd-0.2.4/./fletd
Expected in: flat namespace

Abort trap: 6
$ ./fletd
dyld: Symbol not found: _utimensat
Referenced from: /Users/xxx/.flet/bin/fletd-0.2.4/./fletd
Expected in: flat namespace

Abort trap: 6
$ sw_vers
ProductName: Mac OS X
ProductVersion: 10.12.6

[FeodorFitsner]

Go is in the same situation: golang/go#50855 - recent versions of Go are not compatible with macOS 10.12.